Size Of Table - Any Functions?
Jan 1, 2004Been digging around, I want to query the size of a table (disc size)
Anything?
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SQL Server Admin 2014 :: Possible To Find Table Size And In That Table Each Row Size
Jun 10, 2014It is possible to find table size and in that table each row size.
View 4 Replies View RelatedPassing Table Names To Table Valued Functions
May 25, 2008Hello,
It is possible to write stored procedures which take table names as parameters; is it also possible to do this with table valued functions?
For example, a simple stored procedure is this:
CREATE PROCEDURE SelectTop(@tableName sysname)
AS
BEGIN
Execute('Select top 10 * from ' + @tableName + ';')
END
I want to be able to do the analogous thing with a table valued function (so that I can query the result set, without having to create a temp table). How should I do this (i.e., pass a tablename as an argument to a table valued function)?
Table Size And Database Size
Mar 2, 2008Hi,
i use this script that show me the size of each table and do the sum of all the table size.
SELECT
X.[name],
REPLACE(CONVERT(varchar, CONVERT(money, X.[rows]), 1), '.00', '') AS [rows],
REPLACE(CONVERT(varchar, CONVERT(money, X.[reserved]), 1), '.00', '') AS [reserved],
REPLACE(CONVERT(varchar, CONVERT(money, X.[data]), 1), '.00', '') AS [data],
REPLACE(CONVERT(varchar, CONVERT(money, X.[index_size]), 1), '.00', '') AS [index_size],
REPLACE(CONVERT(varchar, CONVERT(money, X.[unused]), 1), '.00', '') AS [unused]
FROM
(SELECT
CAST(object_name(id) AS varchar(50)) AS [name],
SUM(CASE WHEN indid < 2 THEN CONVERT(bigint, [rows]) END) AS [rows],
SUM(CONVERT(bigint, reserved)) * 8 AS reserved,
SUM(CONVERT(bigint, dpages)) * 8 AS data,
SUM(CONVERT(bigint, used) - CONVERT(bigint, dpages)) * 8 AS index_size,
SUM(CONVERT(bigint, reserved) - CONVERT(bigint, used)) * 8 AS unused
FROM sysindexes WITH (NOLOCK)
WHERE sysindexes.indid IN (0, 1, 255)
AND sysindexes.id > 100
AND object_name(sysindexes.id) <> 'dtproperties'
GROUP BY sysindexes.id WITH ROLLUP) AS X
ORDER BY X.[name]
the problem is that the sum of all tables is not the same size when i make a full database backup.
example of this is when i run this query against my database i see a sum of 111,899 KB that they are 111MB,but when
i do full backup to that database the size of this full backup is 1.5GB,why is that and where this size come from?
THX
Table Valued Functions : Why?
May 12, 2004I'm studying for the MCDBA test & understand table valued functions but am struggling to find a good use for them... can anyone explain to me why you'd want to use one over a view?
View 2 Replies View RelatedSQL 2005 Resize Initial Log Size: MODIFY FILE Failed. Specified Size Is Less Than Current Size.
Sep 4, 2007
I am trying to resize a database initial log file from 500M to 2M. I€™m using€?
ALTER DATABASE <DBNAME> MODIFY FILE ( NAME = <DBLOGFILENAME, SIZE = 2 ) "
And I'm getting "MODIFY FILE failed. Specified size is less than current size." I tried going into the database properties and setting the log file to 2M, but it doesn€™t keep the changes.
Any help with this process?
Views Or Table Valued Functions?
Aug 11, 2004Hi I am writting Stored Procedures that have to be built on the base of other tables specially created for this purpose, is it better to create these intermediate tables as views or as functions returning tables? I guess views would be lighter on performance as they would not be created on the fly?
View 2 Replies View RelatedHelp!!! Troubles With Table-valued Functions
Apr 17, 2008Hi!
Here's my function. The trouble - I can not make ORDER BY the "visits_count", "properties_count", "enquiries_count" fields.
May be some one could help me with this?
CREATE FUNCTION [dbo].[GetPagedStatistics]
(
@start_index int,
@count int,
@condition nvarchar(255),
@order_field nvarchar(255),
@date_from datetime,
@date_to datetime )
RETURNS @total_stat TABLE (
username nvarchar(255),
first_name nvarchar(255),
last_name nvarchar(255),
properties_count int,
enquiries_count int,
visits_count int,
id_user int)
BEGIN
INSERT @total_stat
SELECT
top (@count)
dbo.users.username,
dbo.users.first_name,
dbo.users.last_name,
ISNULL(COUNT(DISTINCT dbo.advertisement.id_advertisement), 0) AS properties_count,
ISNULL(COUNT(DISTINCT dbo.enquiry_emails.id_enquiry_email), 0) AS enquiries_count,
ISNULL(COUNT(DISTINCT dbo.property_statistics.id_statistics), 0) AS visits_count,
dbo.users.id_user
FROM
dbo.property_statistics RIGHT OUTER JOIN
dbo.advertisement RIGHT OUTER JOIN
dbo.users ON dbo.advertisement.id_user = dbo.users.id_user LEFT JOIN
dbo.enquiry_emails ON dbo.enquiry_emails.id_advertisement = dbo.advertisement.id_advertisement ON
dbo.property_statistics.id_advertisement = dbo.advertisement.id_advertisement
WHERE
1=@condition and
(dbo.advertisement.creation_date <= @date_to and dbo.advertisement.creation_date >= @date_from ) and
(
(dbo.enquiry_emails.creation_date <= @date_to
and dbo.enquiry_emails.creation_date >= @date_from
and dbo.property_statistics.view_date <= @date_to
and dbo.property_statistics.view_date >= @date_from ) or
(dbo.property_statistics.view_date is null) or
(dbo.enquiry_emails.creation_date is null)
) and
(ISNULL(dbo.advertisement.id_parent, 0) = 0)
GROUP BY
dbo.users.username,
dbo.users.first_name,
dbo.users.last_name,
dbo.users.id_user
order by
case when @order_field='username' then dbo.users.username end,
case when @order_field='first_name' then dbo.users.first_name end,
case when @order_field='last_name' then dbo.users.last_name end,
case when @order_field='properties_count' then 1 end,
case when @order_field='enquiries_count' then 1 end,
case when @order_field='visits_count' then 1 end
RETURN
END
Table Valued Functions Vs Views
Apr 24, 2008Are there any disadvantages in respect to performance in using table valued functions instead of using a view.
Thanks...
Inline-table-valued Functions
May 1, 2007Help! Been doing the box step with BOL for several hours , Using tables in Adventureworks to create inline-table-valued function to provide a parameterized view of three JOINS - Have sucessfully created the function but can't figure out where to 'Declare' my variable "@SalesAgentID" need to be able to invoke the function with a particular ID - If you can help me cut this dance short I would REALLY Appreciate it.
View 7 Replies View RelatedCLR Table Valued Functions Error
Sep 13, 2006
Hi,
I'm trying to create a CLR functions
this is the Sql Function attribute and the FillRowMethod signature
[Microsoft.SqlServer.Server.SqlFunction(DataAccess = DataAccessKind.Read, SystemDataAccess = SystemDataAccessKind.Read,
FillRowMethodName = "FillRows",IsPrecise=true,
TableDefinition = "SOCIETA nvarchar(55),CLIENTE nvarchar(150),NUMEROCONTRATTO nvarchar(255),FIRMA datetime,CHIUSURA datetime,AUTORIZZATO float"
)]
public static IEnumerable dbf_Create_RiepilogoAccordi(SqlInt32 commessa, SqlInt32 tipo_commessa, SqlInt32 progetto, SqlInt32 DAC, SqlInt32 figura, SqlDateTime dataFatturazioneDa, SqlDateTime dataFatturazioneA)
public static void FillRows(Object obj, out SqlString SOCIETA, out SqlString CLIENTE, out SqlString NUMEROCONTRATTO, out SqlDateTime FIRMA, out SqlDateTime CHIUSURA, SqlDouble AUTORIZZATO)
Whe I try to deploy my function, I get the following error:
Error 1 Function signature of "FillRow" method (as designated by SqlFunctionAttribute.FillRowMethodName) does not match SQL declaration for table valued CLR function 'dbf_Create_RiepilogoAccordi' due to column 6. CM.Reports.SIA.RiepilogoAccordi
I get this error whichever combination of name/value I use for column 6
Can someone help me?
Thanks
Marco
How To Insert Values Into Table Through CLR FUNCTIONS
Jan 15, 2008
Hi,
I have just started working with CLR Userdefined functions(SQL 2005),the below code shows I am inserting a row into
table through a function.
I dont know where am going wrong;but nuthing is happening.
I checked the connection also,in Server Explorer its getting connected with the data base.
**Please help me regarding this******
public partial class UserDefinedFunctions
{
[Microsoft.SqlServer.Server.SqlFunction]
public static int EmpName()
{
using (SqlConnection conn = new SqlConnection("Context Connection=true"))
{
conn.Open();
SqlCommand cmd = conn.CreateCommand();
cmd.CommandText = "INSERT INTO dbo.Employee VALUES('MOHAN',66,22,'GDGDG',55)";
//SqlDataReader rec = new SqlDataReader();
//rec = cmd.ExecuteReader();
int rows = cmd.ExecuteNonQuery();
//string name = rec.GetString(0);
conn.Close();
return rows;
}
Stored Procedures Vs. Table-Valued Functions
Apr 11, 2006Hi everyone.I'd like to know how stored procedures and table-valued functions compare when it comes to returning a resultant set of data. I know there is a link somewhere but I can't immediately find it.Thanks.
View 2 Replies View RelatedMulti-statement Table-valued Functions
May 25, 2004Hello
I am trying to do the following:
1. Create a Multi-statement Table-valued Functions, say mstvF1, with 1 parameter.
2. Then, use it like this: "Select * from table T, mstvF1( T.id )"
It gives me Line 100: Incorrect syntax near 'T', referring to the T of T.id.
If I do
Select * from table T, mstvF1( 5 ), then it works.
Is there any way to do a select from a table T combined with an MSTV function and passing in as a parameter a field from T?
Thanks for any help.
Fastest Way To Execute Aggegate Functions On A Table?
Jul 23, 2005I've probably not given the best title to this topic, but thatreflects my relative "newbie" status.I have a table that goes essentiallyTSDATETIMEjobnumberVARCHARjobentryVARCHAR...the TS is a time stamp, and the other two fields are job numberand entries. There are (many) more fields, but this is the core ofit. The relationship is there will be several entries per job, withone row in the table per entry (i.e several rows per job).In constructing a web interface I want to create a list of recentjob numbers, and summarize it broadly as followsmax(ts)jobnumbercount(jobentry)...I can do this by a select command as followsselect top 30 max(ts) as time, jobnumber, count(jobentry)from Jobsgroup by jobnumberorder by time descHowever I'm now finding that this is quite slow now that my teat tablehas around 400,000 entries (Even though I've added indexes to mostrelevant fields). In particular it's much slower thanselect top 30 jobnumberfrom Jobsgroup by jobnumberorder by jobnumber descleading me to suspect that the aggregate functions are slowing thisdown. I would guesstimate the difference in speed is around a factorof 10-20.As I type this I think I've just realised it's theorder by time descthat is probably causing the problem (in that it will need tocalculate max(ts) for all jobnumber's in the table in order toexecute the "order by" clause).I think I can see the solution now (amazing what typing out a longquestion can do for you :-)My question was going to be if there was any approved method/tricksfor avoiding this sort performance hit.It seemed to me that if I could first grab a decent number of recentrecords (quickly) I could then execute the aggregate functions againstthat smaller set of records. I know in broad terms how any entriesthere can be per job, so I could select enough to make at least 30jobs, and then execute the real query against that. In my case therewill be probably less than 10 entries per job, so I could grab 300records and execute against that, instead of against the whole400,000.That being the case is this best donea) as a subquery, and if so, howb) by creating a temporary intermediate table (which isin essence a more explicit version of (a) isn't it?)Another solution that occurred wasc) to create and maintain a summary table, with justone record per jobnumber with a view to having itserve this particular (common) enquiry.For (c) to work I would probably need triggers on the Jobs table tomaintain the summary table. This would probably represent moreoverhead overall, but should certainly give a better responsewhen the query outlined above is executed on the web site.The response time to this query is becoming critical on the webinterface to avoid timeouts.Any suggestions or comments are welcome. If it's RTFM, then I'dappreciate page numbers :-)Thanks for reading this far :-)--HTML-to-text and markup removal with Detaggerhttp://www.jafsoft.com/detagger/
View 4 Replies View RelatedProblem With Stored Procedure And Table-valued Functions
Apr 1, 2008Hello Gurus,
I have a stored procedure that gathers data from three tables and joins them, two of the tables need to have different rowcounts set, ie. pull only a certain number of rows from one table and only a certain number of rows from another table... The number of rows it should pull are stored within a table for each. Let me explain.... these tables hold Exchange storage group and mailstore data for a number of servers. Each server has a table entry with the number of child storage groups and each storage group has a table entry with the number of child mailstores. The tables get updated every two minutes via a program. I need to be able to get the most Data with the correct child counts for each server and storage group.
I believe that i've found a way to do this with a stored procedure that calls a table-valued function. The table-valued function simply filters down the storage group table to it's number of storage groups, ordered by timestamp. I may be way off here, but i can't tell because both the stored procedure and function check out fine but when i execute the stored procedure it gives me the following error:
Cannot find either column "dbo" or the user-defined function or aggregate "dbo.GetExchSGInfo", or the name is ambiguous.
My code is below:
Stored Procedure:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [dbo].[GetExchangeData2]
@top INT,
@SID INT,
@SGCount INT,
@ServerName VARCHAR(50)
AS
Set @SID = (SELECT ServerID FROM dbo.Servers WHERE ServerName = @ServerName)
Set @top = (SELECT sum(Children) FROM dbo.ExchangeSG WHERE ServerID = @SID)
Set @SGCount = (SELECT SGCount FROM dbo.Servers WHERE ServerID = @SID)
SET ROWCOUNT @top
SELECT dbo.ExchangeMSData.*, dboExchangeMailStore.*, dbo.GetExchSGInfo(@SID,@SGCount) As ExchangeSG, dbo.Servers.*
FROM dbo.Servers INNER JOIN
ExchangeSG ON dbo.Servers.ServerID = ExchangeSG.ServerID INNER JOIN
dbo.ExchangeMailStore ON ExchangeSG.StorageGroupID = dbo.ExchangeMailStore.StorageGroupID INNER JOIN
dbo.ExchangeMSData ON dbo.ExchangeMailStore.MailstoreID = dbo.ExchangeMSData.MailstoreID
WHERE (dbo.Servers.ServerName = @ServerName)
ORDER BY dbo.ExchangeMSData.[TimeStamp] DESC, dbo.ExchangeSG.[TimeStamp] DESC
SET ROWCOUNT 0
And the Function:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION [dbo].[GetExchSGInfo]
(
@SID INT,
@SGCount INT
)
RETURNS TABLE
AS
RETURN
(
SELECT TOP (@SGCount) *
FROM dbo.ExchangeSG
WHERE ServerID = @SID
ORDER BY [TimeStamp]
)
Can anyone help me?
Thanks.
SQL 2012 :: Query Performance - Using Inline / Table Functions
Feb 26, 2014I have query that doesn't even register a time when running it. But when I add the lines that are commented out in the code below, it takes between 20 and 30 seconds! When I run the code for functions directly,I know when I include it like this, it loses the Indexing capabilities?
SELECT
----, ISNULL(CAST(NULLIF(dbo.ufnGetRetail(I.ISBN13),0.00) AS VARCHAR(20)), 'N/A') RetailPrice
----, ISNULL(CAST(NULLIF(SP.LocalPrice,0.00) AS VARCHAR(20)),'on request') LocalPrice
[code]...
How to have the functions included but have the query response time come down?
Differences Between SQL Stored Procedures And Table-valued Functions
Sep 6, 2006I am a bit confused by the difference between a stored procedure and a table-valued function. Can somebody please either give me a simple explanation, or point me at something I can read.
I thought I had it worked out, and had coded some action queries as stored procedures, and I wrote a table-valued function that was effectively an encapsulated SELECT so that SELECT * FROM Spouse(@ID) worked fine. Then I wanted to use a function SpousePair, that was similar to Spouse, to power a Gridview. I discovered that I couldn't. It seems that a SQLDataSource requires either a SELECT statement or a stored procedure. So I wrote a stored procedure SpousePair(@ID1, @ID2).
I find that whereas I tested Spouse with
SELECT * FROM SPOUSE(@ID)
I tested SpousePair with
EXEC SpousePair @ID1 @id2
Now I want to combine these: if I could I would write
SELECT * FROM SPOUSE(@ID) WHERE SPOUSEID NOT IN
(SELECT SPOUSEID FROM SpousePair(@ID1, @ID2))
However this is invalid because you can't put a stored procedure in a Select statement, and SELECT .... NOT IN (EXEC SpousePair @ID1 @ID2) is also invalid.
Is there any alternative to creating a table-valued function, SpousePairA, that is identical to SpousePair but coded as a function. I'm reluctant to do this because then I'll have two bits of quite complicated SQL logic to maintain.
Table Valued Functions - Yield Return Error
Aug 4, 2006So I was creating a new table-valued function today which queries some data from a preexisting table. Since this is my first table-valued function, I decided to check out some of the examples and see what I can figure out.
One particular example helped me out a bit until I ran into some data access issues...
http://msdn2.microsoft.com/en-us/library/ms165054.aspx
So I create my function:
[SqlFunction(DataAccess = DataAccessKind.Read,SystemDataAccess=SystemDataAccessKind.Read,FillRowMethodName = "FillMyRow",TableDefinition ="p1 int, p2 int"]
public static IEnumerable getMyTable()
{
using (SqlConnection conn = ....)
{
using (SqlCommand command = conn.CreateCommand())
{
///.... populate command text, open connection
using (SqlDataReader rdr = command.ExecuteReader())
{
while (rdr.Read())
{
customObject1 o = new customObject1();
///... populate o's parameters from reader ...
yield return o;
}
}
}
}
public static void FillMyRow(
object source,
out int p1,
out int p2)
{
customObject1 f = (customObject1)source;
p1 = f.p1;
p2 = f.p2;
}
Notice, this example yield returns the value o upon each iteration of the reader.
Despite the fact that the DataAccess is set to Read I still get the error...
An error occurred while getting new row from user defined Table Valued Function :
System.InvalidOperationException: Data access is not allowed in this context. Either the context is a function or method not marked with DataAccessKind.Read or SystemDataAccessKind.Read, is a callback to obtain data from FillRow method of a Table Valued Function, or is a UDT validation method.
I did however get past this error, by creating a collection of customObject1, populated it within the while(rdr.Read()) loop, then return the collection after closing the connection, command and reader.
I assume this error has something to do with the fact that you can't yield return results from within an open reader. Is this error right though in this case? Whats causing it to throw a InvOp Exception? Or is this a bug?
Thanks for the attention.
Can We Pass Filed Name And Table Name As Parameter To User Defined Functions
Dec 29, 2005Hi,
Following is the user defined function I want to get maximum value. It gives man an error "@strTableName must declare"
CREATE FUNCTION dbo.GetMaximum
(
@strFieldNamenvarchar(255),
@strTableName nvarchar(255)
)
RETURNS nvarchar(255)
AS
BEGIN
DECLARE @maxID int
SELECT @maxID=(SELECT IsNull(MAX(@strFieldName),0)+1 FROM @strTableName )
RETURN (@maxID)
END
Using OPTION Clause Within CREATE FUNCTION Statement For Inline Table Functions
May 13, 2008Hi!
I need to expand resursion level for resursive CTE expression within CREATE FUNCTION statement for inline table function to a value greater than default. It turns out that OPTION clause for MAXRECURSION hint perfectly works if I use it outside CREATE FUNCTION (as well as CREATE VIEW for non-parametrized queries), but it does not within CREATE FUNCTION statement - I'm getting error:
Msg 156, Level 15, State 1, Procedure ExpandedCTE, Line 34
Incorrect syntax near the keyword 'option'.
Here is the function:
create FUNCTION [dbo].[ExpandedCTE]
(
@p_id int
)
RETURNS TABLE
AS
RETURN
(
with tbl_cte (id, tbl_id, lvl)
as
(
select
id, tbl_id, 0 lvl
from
tbl
where
id = @p_id
union all
select
t.id, t.tbl_id, lvl + 1
from
tbl_cte
inner join tbl t
on rnr.tbl_id = tbl_cte.id
)
select
id, tbl_id, lvl
from
tbl_cte
option (maxrecursion 0)
)
Please help!
Alexander.
P.S.
I'm really sorry if it is about syntax, but I could not find it in the documentation.
SQL Server 2005: CLR Functions Vs SQL Functions
May 26, 2006I was playing around with the new SQL 2005 CLR functionality andremembered this discussion that I had with Erland Sommarskog concerningperformance of scalar UDFs some time ago (See "Calling sp_oa* infunction" in this newsgroup). In that discussion, Erland made thefollowing comment about UDFs in SQL 2005:[color=blue][color=green]>>The good news is that in SQL 2005, Microsoft has addressed several of[/color][/color]these issues, and the cost of a UDF is not as severe there. In fact fora complex expression, a UDF in written a CLR language may be fasterthanthe corresponding expression using built-in T-SQL functions.<<I thought the I would put this to the test using some of the same SQLas before, but adding a simple scalar CLR UDF into the mix. The testinvolved querying a simple table with about 300,000 rows. Thescenarios are as follows:(A) Use a simple CASE function to calculate a column(B) Use a simple CASE function to calculate a column and as a criterionin the WHERE clause(C) Use a scalar UDF to calculate a column(D) Use a scalar UDF to calculate a column and as a criterion in theWHERE clause(E) Use a scalar CLR UDF to calculate a column(F) Use a scalar CLR UDF to calculate a column and as a criterion inthe WHERE clauseA sample of the results is as follows (time in milliseconds):(295310 row(s) affected)A: 1563(150003 row(s) affected)B: 906(295310 row(s) affected)C: 2703(150003 row(s) affected)D: 2533(295310 row(s) affected)E: 2060(150003 row(s) affected)F: 2190The scalar CLR UDF function was significantly faster than the classicscalar UDF, even for this very simple function. Perhaps a more complexfunction would have shown even a greater difference. Based on this, Imust conclude that Erland was right. Of course, it's still faster tostick with basic built-in functions like CASE.In another test, I decided to run some queries to compare built-inaggregates vs. a couple of simple CLR aggregates as follows:(G) Calculate averages by group using the built-in AVG aggregate(H) Calculate averages by group using a CLR aggregate that similatesthe built-in AVG aggregate(I) Calculate a "trimmed" average by group (average excluding highestand lowest values) using built-in aggregates(J) Calculate a "trimmed" average by group using a CLR aggregatespecially designed for this purposeA sample of the results is as follows (time in milliseconds):(59 row(s) affected)G: 313(59 row(s) affected)H: 890(59 row(s) affected)I: 216(59 row(s) affected)J: 846It seems that the CLR aggregates came with a significant performancepenalty over the built-in aggregates. Perhaps they would pay off if Iwere attempting a very complex type of aggregation. However, at thispoint I'm going to shy away from using these unless I can't find a wayto do the calculation with standard SQL.In a way, I'm happy that basic SQL still seems to be the fastest way toget things done. With the addition of the new CLR functionality, Isuspect that MS may be giving us developers enough rope to comfortablyhang ourselves if we're not careful.Bill E.Hollywood, FL------------------------------------------------------------------------- table TestAssignment, about 300,000 rowsCREATE TABLE [dbo].[TestAssignment]([TestAssignmentID] [int] NOT NULL,[ProductID] [int] NULL,[PercentPassed] [int] NULL,CONSTRAINT [PK_TestAssignment] PRIMARY KEY CLUSTERED([TestAssignmentID] ASC)--Scalar UDF in SQLCREATE FUNCTION [dbo].[fnIsEven](@intValue int)RETURNS bitASBEGINDeclare @bitReturnValue bitIf @intValue % 2 = 0Set @bitReturnValue=1ElseSet @bitReturnValue=0RETURN @bitReturnValueEND--Scalar CLR UDF/*using System;using System.Data;using System.Data.SqlClient;using System.Data.SqlTypes;using Microsoft.SqlServer.Server;public partial class UserDefinedFunctions{[Microsoft.SqlServer.Server.SqlFunction(IsDetermini stic=true,IsPrecise=true)]public static SqlBoolean IsEven(SqlInt32 value){if(value % 2 == 0){return true;}else{return false;}}};*/--Test #1--Scenario A - Query with calculated column--SELECT TestAssignmentID,CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END ASCalcColumnFROM TestAssignment--Scenario B - Query with calculated column as criterion--SELECT TestAssignmentID,CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END ASCalcColumnFROM TestAssignmentWHERE CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END=1--Scenario C - Query using scalar UDF--SELECT TestAssignmentID,dbo.fnIsEven(TestAssignmentID) AS CalcColumnFROM TestAssignment--Scenario D - Query using scalar UDF as crierion--SELECT TestAssignmentID,dbo.fnIsEven(TestAssignmentID) AS CalcColumnFROM TestAssignmentWHERE dbo.fnIsEven(TestAssignmentID)=1--Scenario E - Query using CLR scalar UDF--SELECT TestAssignmentID,dbo.fnIsEven_CLR(TestAssignmentID) AS CalcColumnFROM TestAssignment--Scenario F - Query using CLR scalar UDF as crierion--SELECT TestAssignmentID,dbo.fnIsEven_CLR(TestAssignmentID) AS CalcColumnFROM TestAssignmentWHERE dbo.fnIsEven(TestAssignmentID)=1--CLR Aggregate functions/*using System;using System.Data;using System.Data.SqlClient;using System.Data.SqlTypes;using Microsoft.SqlServer.Server;[Serializable][Microsoft.SqlServer.Server.SqlUserDefinedAggregate (Format.Native)]public struct Avg{public void Init(){this.numValues = 0;this.totalValue = 0;}public void Accumulate(SqlDouble Value){if (!Value.IsNull){this.numValues++;this.totalValue += Value;}}public void Merge(Avg Group){if (Group.numValues > 0){this.numValues += Group.numValues;this.totalValue += Group.totalValue;}}public SqlDouble Terminate(){if (numValues == 0){return SqlDouble.Null;}else{return (this.totalValue / this.numValues);}}// private accumulatorsprivate int numValues;private SqlDouble totalValue;}[Serializable][Microsoft.SqlServer.Server.SqlUserDefinedAggregate (Format.Native)]public struct TrimmedAvg{public void Init(){this.numValues = 0;this.totalValue = 0;this.minValue = SqlDouble.MaxValue;this.maxValue = SqlDouble.MinValue;}public void Accumulate(SqlDouble Value){if (!Value.IsNull){this.numValues++;this.totalValue += Value;if (Value < this.minValue)this.minValue = Value;if (Value > this.maxValue)this.maxValue = Value;}}public void Merge(TrimmedAvg Group){if (Group.numValues > 0){this.numValues += Group.numValues;this.totalValue += Group.totalValue;if (Group.minValue < this.minValue)this.minValue = Group.minValue;if (Group.maxValue > this.maxValue)this.maxValue = Group.maxValue;}}public SqlDouble Terminate(){if (this.numValues < 3)return SqlDouble.Null;else{this.numValues -= 2;this.totalValue -= this.minValue;this.totalValue -= this.maxValue;return (this.totalValue / this.numValues);}}// private accumulatorsprivate int numValues;private SqlDouble totalValue;private SqlDouble minValue;private SqlDouble maxValue;}*/--Test #2--Scenario G - Average Query using built-in aggregate--SELECT ProductID, Avg(Cast(PercentPassed AS float))FROM TestAssignmentGROUP BY ProductIDORDER BY ProductID--Scenario H - Average Query using CLR aggregate--SELECT ProductID, dbo.Avg_CLR(Cast(PercentPassed AS float)) AS AverageFROM TestAssignmentGROUP BY ProductIDORDER BY ProductID--Scenario I - Trimmed Average Query using built in aggregates/setoperations--SELECT A.ProductID,CaseWhen B.CountValues<3 Then NullElse Cast(A.Total-B.MaxValue-B.MinValue ASfloat)/Cast(B.CountValues-2 As float)End AS AverageFROM(SELECT ProductID, Sum(PercentPassed) AS TotalFROM TestAssignmentGROUP BY ProductID) ALEFT JOIN(SELECT ProductID,Max(PercentPassed) AS MaxValue,Min(PercentPassed) AS MinValue,Count(*) AS CountValuesFROM TestAssignmentWHERE PercentPassed Is Not NullGROUP BY ProductID) BON A.ProductID=B.ProductIDORDER BY A.ProductID--Scenario J - Trimmed Average Query using CLR aggregate--SELECT ProductID, dbo.TrimmedAvg_CLR(Cast(PercentPassed AS real)) ASAverageFROM TestAssignmentGROUP BY ProductIDORDER BY ProductID
View 9 Replies View RelatedTable Size
Mar 1, 2002I have some question and would like ask experts:
The largest table in our database eats up above 4G . we do "sp_spaceused" for this table.The length of all columns of this table ( just int, char, varchar, money ,numeric fields types) is about 200 bytes, and the table has around 1,300,000 rows, but the reserved spaced for this table is 4,800,000kb and the data space is around 4,600,00kb.
How can average each row take 3.7kb ( the total size of all columns just 200 bytes)? Any other things I need check?
Any one can give any suggestion what cause this problem? or it is normal?
Thank you very much.
Judy
Table Size
May 18, 2001Hello, Everyone,
Can anyone tell me how to find the size of a table in a DB?
Thanks,
Table Size In SQL 6.5
Nov 21, 2000I'm trying to run a query or sp that will give me a
list of tables and the number of rows in it.
Is there any way for me to do this?
I appreciate the assistance.
Toni
Table Size
Dec 21, 1999I am wondering if there is the limitation of maximum table size in SQL 6.5. I have a table with 2.6GB and 12,000,000 rows in SQL 6.5 database. Is this a problem?
TIA,
Stella Liu
Max Table Size?
Jul 15, 1999Is there a practical size limit, in MB's, of a table in SQL Server 6.5?
Is there a size, that once exceeded, degrades performance signifigantly?
I am speaking of raw megabytes. The table in question will consist of only 3 int columns but has the possiblity of becoming VERY LARGE (+1,000,000 rows). I am still in the design phase and can change my strategy if this will prove to be a problem.
Thanks for any help!
Table Size.
Jan 14, 1999hello all,
I am trying to solve this problem for quite some time.. I was wondering if I can get some help..
These questions are all abt. MSSQL 6.5
1. Is there a limit on the size of the table ?
2. Does it make sense to have more tables if the size of the row size is more that the limit set by 6.5 or i should let have more rows in a different table with duplicate entries for a particular field.
3. What is the number of rows before the performance of a query starts getting affected..
Thanks..
Sachin.
Table Size
Aug 26, 2002I created a same table on two different server with same data. I run sp_sapceuse on both server and I got following result
it's useing 392 MB for table
name rows reserved data index_size unused
-------------------------------------------------------------------------------------------------------------------------------- ----------- ------------------ ------------------ ------------------ ------------------
DUNS_SITE 100000 401288 KB 400000 KB 1264 KB 24 KB
its using only 97.3 MB
name rows reserved data index_size unused
-------------------------------------------------------------------------------------------------------------------------------- ----------- ------------------ ------------------ ------------------ ------------------
DUNS_SITE 100000 99720 KB 99376 KB 328 KB 16 KB
WHY?????
Thanks
Manesh
Table Size
Jul 19, 2004Hello,
How can i get the size of a table in sqserver 2000 ?
How can read a image field ?
Thanks for this answer.
Max Size Of A Table
Mar 2, 2005Is there a maximum or optimum number of rows I should have in a table so that I can have fastest search queries. I am a novice programmer just developed something for my work place.
The database has a table created by converting data from excel spreadsheets. There were 24 spreadsheets for 12 months each having approximately 500 rows. Designed this way the table will have approximately 24 * 500 = 12000 records. Should I consider redesigning the database to make searches faster
Table Size ;
May 25, 2006Hi all,
How can I find the exact size in the disk occupied by a TABLE ?
When I execute "sp_spaceused" it returns the following parameters for a table
reserved
data
index_size
unused
Which of the parameters I should consider to calculate the exact space occupied by the table.
Thanks in advance,
Hari Haran Arulmozhi
Table Size
Jan 19, 2006Is there any way I can find the size of each table?
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