Creates a table of prime numbers, starting at 2 up to a maximum number.
Makes use of dbo.F_TABLE_NUMBER_RANGE, which is found here:
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=47685
create function dbo.F_TABLE_PRIME(@MaxNumber bigint)
returns @t table (i bigint primary key) as
begin
insert @t select NUMBER from dbo.F_TABLE_NUMBER_RANGE(2, @MaxNumber)
declare @i bigint
set @i = 1
while 1 = 1
begin
select @i = min(i) from @t where i > @i
if @i is null or @i * @i > @MaxNumber break
delete @t where i > @i and i % @i = 0
end
return
end
go
select * from dbo.F_TABLE_PRIME(100000) order by iCan we improve on the speed?
Ryan Randall
www.monsoonmalabar.com London-based IT consultancy
Solutions are easy. Understanding the problem, now, that's the hard part.
create function dbo.F_NTH_PRIME(@n bigint) returns bigint as begin declare @MaxNumber bigint, @i bigint set @MaxNumber = case when @n <=6 then 20 else @n * log(@n) + @n * log(log(@n)) end
declare @t table (n bigint identity(1, 1), i bigint) insert @t select i from dbo.F_TABLE_PRIME(@MaxNumber) select @i = i from @t where n = @n
return @i end
--calculation (ran in 2 seconds for me) select n, dbo.F_NTH_PRIME(n) as 'nth prime' from ( select 1 n union select 2 union select 3 union select 10 union select 25 union select 100 union select 1000 union select 9593 union select 10000) a
/*results n nth prime ----------- -------------------- 1 2 2 3 3 5 10 29 25 97 100 541 1000 7919 9593 100003 10000 104729 */For dbo.F_TABLE_PRIME, see http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=69646
Ryan Randall www.monsoonmalabar.com London-based IT consultancy
Solutions are easy. Understanding the problem, now, that's the hard part.
This script is for an in-line table function, F_TABLE_NUMBER_RANGE, that generates a number table. The input parameters are the @START_NUMBER and @END_NUMBER. It returns a sorted result set containing all intergers from @START_NUMBER to @END_NUMBER inclusive.
This is an improved version of a script that I posted on a topic a few weeks ago. I modified it to cross join fewer tables based on powers of 16, instead of powers of 2, because I found that this compiled and ran much faster for small result sets (less than 10,000 rows).
This is the link to the other post: http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=46252&whichpage=5
SET QUOTED_IDENTIFIER ON GO SET ANSI_NULLS ON GO if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[F_TABLE_NUMBER_RANGE]') and xtype in (N'FN', N'IF', N'TF')) drop function [dbo].[F_TABLE_NUMBER_RANGE] GO create function dbo.F_TABLE_NUMBER_RANGE ( @START_NUMBERint, @END_NUMBERint ) /* This function returns an integer table containing all integers in the range of@START_NUMBER through @END_NUMBER, inclusive. The maximum number of rows that this function can return is 16777216. */
returns table as
return ( selecttop 100 percent NUMBER = (a.NUMBER+b.NUMBER)+ -- Add the starting number for the final result set -- The case is needed, because the start and end -- numbers can be passed in any order case when @START_NUMBER <= @END_NUMBER then @START_NUMBER else @END_NUMBER end from ( Selecttop 100 percent NUMBER = convert(int,N01+N02+N03) From -- Cross rows from 3 tables based on powers of 16 -- Maximum number of rows from cross join is 4096, 0 to 4095 ( select N01 = 0 union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9 union all select 10 union all select 11 union all select 12 union all select 13 union all select 14 union all select 15 ) n01 cross join ( select N02 = 0 union all select 16 union all select 32 union all select 48 union all select 64 union all select 80 union all select 96 union all select 112 union all select 128 union all select 144 union all select 160 union all select 176 union all select 192 union all select 208 union all select 224 union all select 240 ) n02 cross join ( select N03 = 0 union all select 256 union all select 512 union all select 768 union all select 1024 union all select 1280 union all select 1536 union all select 1792 union all select 2048 union all select 2304 union all select 2560 union all select 2816 union all select 3072 union all select 3328 union all select 3584 union all select 3840 ) n03 where -- Minimize the number of rows crossed by selecting only rows -- with a value less the the square root of rows needed. N01+N02+N03 < -- Square root of total rows rounded up to next whole number convert(int,ceiling(sqrt(abs(@START_NUMBER-@END_NUMBER)+1))) order by 1 ) a cross join ( Selecttop 100 percent NUMBER = convert(int, (N01+N02+N03) * -- Square root of total rows rounded up to next whole number convert(int,ceiling(sqrt(abs(@START_NUMBER-@END_NUMBER)+1))) ) From -- Cross rows from 3 tables based on powers of 16 -- Maximum number of rows from cross join is 4096, 0 to 4095 ( select N01 = 0 union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9 union all select 10 union all select 11 union all select 12 union all select 13 union all select 14 union all select 15 ) n01 cross join ( select N02 = 0 union all select 16 union all select 32 union all select 48 union all select 64 union all select 80 union all select 96 union all select 112 union all select 128 union all select 144 union all select 160 union all select 176 union all select 192 union all select 208 union all select 224 union all select 240 ) n02 cross join ( select N03 = 0 union all select 256 union all select 512 union all select 768 union all select 1024 union all select 1280 union all select 1536 union all select 1792 union all select 2048 union all select 2304 union all select 2560 union all select 2816 union all select 3072 union all select 3328 union all select 3584 union all select 3840 ) n03 where -- Minimize the number of rows crossed by selecting only rows -- with a value less the the square root of rows needed. N01+N02+N03 < -- Square root of total rows rounded up to next whole number convert(int,ceiling(sqrt(abs(@START_NUMBER-@END_NUMBER)+1))) order by 1 ) b where a.NUMBER+b.NUMBER < -- Total number of rows abs(@START_NUMBER-@END_NUMBER)+1and -- Check that the number of rows to be returned -- is less than or equal to the maximum of 16777216 case when abs(@START_NUMBER-@END_NUMBER)+1 <= 16777216 then 1 else 0 end = 1 order by 1 )
GO GRANT SELECT ON [dbo].[F_TABLE_NUMBER_RANGE] TO [public] GO
-- Demo using the function to ruturn numbers 1 to 2000 select NUMBER from dbo.F_TABLE_NUMBER_RANGE(1,2000)
-- Demo using the function to ruturn numbers -1500 to 2000 select NUMBER from dbo.F_TABLE_NUMBER_RANGE(-1500,2000)
I want to write a function, which accept 3 parameters, 1 TableName 2 ColumnName 3 DateValue, and returns number of records in that table for that particular date(in parameter date), I have written below function but it is not returning the desired result.
CREATE FUNCTION dbo.[f_Rec_cnt] (@InTableName NVARCHAR(100), @InDtColName NVARCHAR(50), @InDate NVARCHAR(50) ) RETURNS INT
Hello,Is the multiple instances capability of SQL2K mature enough for aProduction system?We're looking at upgrading our hardware but the proposed solutioncalls for consolidating two currently separate SQL Server's onto onemachine with two CPU's.Of the current two servers, one is for OLTP (~800Mb) and the other forreporting (some ad-hoc, some canned queries, 2-3Gb). We purge the OLTPdb nightly and archive the purged data in the reporting server whereit stays for a couple of months before getting purged from there.Maybe I'm being overly cautious here but the OLTP system is especiallytime-sensitive. If anything causes it to slow down significantly welose $$$.Thanks,Martin V.
hi and thanks for your help. Is there such a code that return whether or not a field is either positive or negative. If I have a field that contain numeric value. lets say -500 can I run a code that check the sign ?
I wrote a Scalar UDF in SQL2005 that returns an integer. I want to be able to display this integer in a ASP.Net 2.0 web page. I typically use a DAL for all data so I added an ObjectDataSource as a Qeury that contains only the UDF. How do I easily display the value in a Label Control or? I have tried to use a Repeater with a label, a Formview with a Label, all to no avail. Any suggestions?
Split function. I have records of multiple users, the last value of every record is a contact number (10 Digits- Numeric), I want a split function which can take the whole text and split the records on the basis of contact number.
In order words i want SQL to locate the contact number and move to the next record after that and so on till the end of the text.
create table tbl_1 (txt varchar (max))
insert into tbl_1 values ('john asfasdf 535 summit ave franklin lks nj 15521 510_644_1079 na na 5,8/12 executive, finance finance and planning far 5537 21133 8.25 126 ronald d hensor jr. 5575621596
[Code] .....
Output john jimenez 535 summit ave franklin lks nj 15521 510_644_1079 na na 5,8/12 executive,finance finance and planning far 5537 21133 8.25 126 ronald d hensor jr. 5575621596 jeffrey galione 57 allen dr wayne nj 15810 562_434_0710 na na 5,8/12 executive, technical sales and support good 8137 91630 8.25 126 eileen oneal 8258364083
From what I've seen, the CheckSum_Agg function appears to returns 0 for even number of repeated values. If so, then what is the practical use of this function for implementing an aggregate checksum across a set of values?
For example, the following work as expected; it returns a non-zero checksum across (1) value or across (2) unequal values.
declare @t table ( ID int ); insert into @t ( ID ) values (-7077); select checksum_agg( ID ) from @t; ----------- -7077 declare @t table ( ID int ); insert into @t ( ID ) values (-7077), (-8112); select checksum_agg( ID ) from @t; ----------- 1035
However, the function appears to returns 0 for an even number of repeated values.
declare @t table ( ID int ); insert into @t ( ID ) values (-7077), (-7077); select checksum_agg( ID ) from @t; ----------- 0
It's not specific to -7077, for example:
declare @t table ( ID int ); insert into @t ( ID ) values (-997777), (-997777); select checksum_agg( ID ) from @t; ----------- 0
What's curious is that (3) repeated equal values will return a checksum > 0.
declare @t table ( ID int ); insert into @t ( ID ) values (-997777), (-997777), (-997777); select checksum_agg( ID ) from @t; ----------- -997777
But a set of (4) repeated equal values will return 0 again.
declare @t table ( ID int ); insert into @t ( ID ) values (-997777), (-997777), (-997777), (-997777); select checksum_agg( ID ) from @t; ----------- 0
Finally, a set of (2) uneuqal values repeated twice will return 0 again.
declare @t table ( ID int ); insert into @t ( ID ) values (-997777), (8112), (-997777), (8112); select checksum_agg( ID ) from @t; ----------- 0
I have sql code that returns the correct number of record when run without an aggregate function like count(myfield) and group by myfield. It always returns 86 row which is correct when Select DISTINCT is used. As, expected when DISTINCT is not used I get double the number if rows or 172. But when I count(myfield) and group by myfield the count is 172 and not 86. The strangest thing about this is that when I am grouping a set of items
Group 1
Group 2
Group 3
The other group sum up correctly while others don't. What can explain this? Here is the code.
Select DISTINCT ws.p4Districtnumber, ws.cycle, ws.worksetid, count(msi.MeterSessionInputKey) as ASND from fcs.dbo.WorkSet as ws left outer join fcs.dbo.WorkAssignment as wa on ws.WorkSetID = wa.WorkSetID left outer join fcs.dbo.MeterSessionInput as msi on wa.worksetkey = msi.worksetkey
How is the best way to make a function for summing an arbitrary number of times values (table parm?)- I 've read it's necessary to convert to seconds, sum then convert back, but Im' wondering if there's an alternative.
Here's the example I want to sum: 00:02:01:30 00:01:28:10 00:01:01:50 00:06:50:30 00:00:01:50
The SP UserPersist_GetByCriteria does a "SELECT * FROM tbl_User WHERE gender = @Gender AND culture = @Culture", so why am I receiving this error when both tables have the same structure?
The error is being reported as coming from UserPersist_GetByCriteria on the "SELECT * FROM tbl_User" line.
need help how to archiv table to another table with unique number for all rows once + date time (not the second only day time +minute) i need whan i insert to the another table add 2 more fields (unique number , date_time )
this is the table 1 i select from ID fname new_date val_holiday ----------------------------------------------------
this is the table 2 i insert into ---------------------------------- ID fname new_date val_holiday unique number date_time --------------------------------------------------------------------------------------------------------------------
for evry archiv table to another table (insert) i need to get a unique number + date time (not the second only day time +minute)
next insert ...... ID fname new_date val_holiday unique number date_time --------------------------------------------------------------------------------------------------------------------
next insert ...... ID fname new_date val_holiday unique number date_time --------------------------------------------------------------------------------------------------------------------
I started with an inline table returning function with a hard coded input table name. This works fine, but my boss wants me to generalize the function, to give it in input table parameter. That's where I'm running into problems.
In one forum, someone suggested that an input parameter for a table is possible in 2012, and the example I saw used "sysname" as the parameter type. It didn't like that. I tried "table" for the parameter type. It didn't like that.
The other suggestion was to use dynamic sql, which I assume means I can no longer use an inline function.
This means switching to the multi-line function, which I will if I have to, but those are more tedious.
Any syntax for using the inline function to accomplish this, or am I stuck with multi-line?
A simple example of what I'm trying to do is below:
Create FUNCTION [CSH388102].[fnTest] ( -- Add the parameters for the function here @Source_Tbl sysname ) RETURNS TABLE AS RETURN ( select @Source_Tbl.yr from @Source_Tbl )
Error I get is:
Msg 1087, Level 16, State 1, Procedure fnTest, Line 12 Must declare the table variable "@Source_Tbl".
If I use "table" as the parameter type, it gives me:
Msg 156, Level 15, State 1, Procedure fnTest, Line 4 Incorrect syntax near the keyword 'table'. Msg 137, Level 15, State 2, Procedure fnTest, Line 12 Must declare the scalar variable "@Source_Tbl".
Does anyone know where to find or how to write a quick user defined fucntionthat will return a table object when passed the string name of the tableobject. The reason why I want dynamicallly set the table name in a storedprocudue WITHOUT using concatination and exec a SQL String.HenceIf @small_int_parameter_previous = 1 then@vchar_tablename = "sales_previous"else@vchar_tablename = "sales"Endselect * from udf_TableLookup(@vchar_tablename )So if I pass 1, that means I want all records from "sales_previous"otherwise give me all records from "sales" (Sales_Previous would last yearssales data for example).udf_TableLookup would I guess lookup in sysobjects for the table name andreturn the table object? I don't know how to do this.I want to do this to avoid having 2 stored procedures..one for current andone for previous year.Please respond to group so others may benfiit from you knowledge.ThanksErik
Here is the scenario, I have 2 stored procedures, SP1 and SP2
SP1 has the following code:
declare @tmp as varchar(300) set @tmp = 'SELECT * FROM OPENROWSET ( ''SQLOLEDB'', ''SERVER=.;Trusted_Connection=yes'', ''SET FMTONLY OFF EXEC ' + db_name() + '..StoredProcedure'' )'
EXEC (@tmp)
SP2 has the following code:
SELECT * FROM SP1 (which won't work because SP1 is a stored procedure. A view, a table valued function, or a temporary table must be used for this)
Views - can't use a view because they don't allow dynamic sql and the db_name() in the OPENROWSET function must be used. Temp Tables - can't use these because it would cause a large hit on system performance due to the frequency SP2 and others like it will be used. Functions - My last resort is to use a table valued function as shown:
FUNCTION MyFunction ( ) RETURNS @retTable ( @Field1 int, @Field2 varchar(50) ) AS BEGIN -- the problem here is that I need to call SP1 and assign it's resulting data into the -- @retTable variable
-- this statement is incorrect, but it's meaning is my goal INSERT @retTableSELECT *FROM SP1
Ok, I'm pretty knowledgable about T-SQL, but I've hit something that seems should work, but just doesn't... I'm writing a stored procedure that needs to use the primary key fields of a table that is being passed to me so that I can generate what will most likely be a dynamically generated SQL statement and then execute it. So the first thing I do, is I need to grab the primary key fields of the table. I'd rather not go down to the base system tables since we may (hopefully) upgrade this one SQL 2000 machine to 2005 fairly soon, so I poke around, and find sp_pkeys in the master table. Great. I pass in the table name, and sure enough, it comes back with a record set, 1 row per column. That's exactly what I need. Umm... This is the part where I'm at a loss. The stored procedure outputs the resultset as a resultset (Not as an output param). Now I want to use that list in my stored procedure, thinking that if the base tables change, Microsoft will change the stored procedure accordingly, so even after a version upgrade my stuff SHOULD still work. But... How do I use the resultset from the stored procedure? You can't reference it like a table-valued function, nor can you 'capture' the resultset for use using the syntax like: DECLARE @table table@table=EXEC sp_pkeys MyTable That of course just returns you the RETURN_VALUE instead of the resultset it output. Ugh. Ok, so I finally decide to just bite the bullet, and I grab the code from sp_pkeys and make my own little function called fn_pkeys. Since I might also want to be able to 'force' the primary keys (Maybe the table doesn't really have one, but logically it does), I decide it'll pass back a comma-delimited varchar of columns that make up the primary key. Ok, I test it and it works great. Now, I'm happily going along and building my routine, and realize, hey, I don't really want that in a comma-delimited varchar, I want to use it in one of my queries, and I have this nice little table-valued function I call split, that takes a comma-delimited varchar, and returns a table... So I preceed to try it out... SELECT *FROM Split(fn_pkeys('MyTable'),DEFAULT) Syntax Error. Ugh. Eventually, I even try: SELECT *FROM Split(substring('abc,def',2,6),DEFAULT) Syntax Error. Hmm...What am I doing wrong here, or can't you use a scalar-valued function as a parameter into a table-valued function? SELECT *FROM Split('bc,def',DEFAULT) works just fine. So my questions are: Is there any way to programmatically capture a resultset that is being output from a stored procedure for use in the stored procedure that called it? Is there any way to pass a scalar-valued function as a parameter into a table-valued function? Oh, this works as well as a work around, but I'm more interested in if there is a way without having to workaround: DECLARE @tmp varchar(8000) SET @tmp=(SELECT dbo.fn_pkeys('MyTable')) SELECT * FROM Split(@tmp,DEFAULT)
Can someone tell me if it is possible to add an index to a Table variable that is declare as part of a table valued function ? I've tried the following but I can't get it to work.
ALTER FUNCTION dbo.fnSearch_GetJobsByOccurrence ( @param1 int, @param2 int ) RETURNS @Result TABLE (resultcol1 int, resultcol2 int) AS BEGIN
I need to return a table of values calculated from other tables. I have about 10 reports which will use approx. 6 different table structures.
Would it be better performance wise to create a physical table in the database to update while calculating using an identity field to id the stored procedure call, return the data and delete the records. For Example:
I need to return a table of values calculated from other tables. I have about 10 reports which will use approx. 6 different table structures.
Would it be better performance wise to create a physical table in the database to update while calculating using an identity field to id the stored procedure call, return the data and delete the records. For Example:
I have a stored produre. Inside this stored procedure I have table variable with one column. Once the table variable is populated with rows, I would like to pass each value in the table, into a table-valued function. The table-valued function may return any number of rows. I would like all the rows the TVF returns to be returned from the stored procedure as a single result set. I would also like to do this without defining a table variable to hold the results of the table-value function.
Code Snippet
declare @IdTable table ( EmployeeId nvarchar( 16 ) not null ) insert into @IdTable select EmployeeNumber from Employees
/* I need to run this query for every EmployeeId value in @IdTable and return the results from the stored proc as a single result set. */ select * from fn_GetEmployeeById( EmployeeId )
In my stored procedure i have a multi-valued varchar(max) parameter and I wrote a table-valued function that takes the varchar(max) and return a table back to the stored procedure where i inserted into a @table. Just wondering is there a better and faster way of doing this?
ALTER PROCEDURE [dbo].[rpt]
(
@CourtIDs as nvarchar(MAX) -- @CourtIDs = '1231,3432,1234,3421'
) AS
--split CourtIDs into a table DECLARE @tbCourtIDs table(CourtID int NOT NULL PRIMARY KEY) INSERT INTO @tbCourtIDs select * from dbo.Split(@CourtIDs, ',')
Table name.. Emp col- Name Salary a 500 b 700 c 800 there must the the row no which is maintain by sql server. So I want to retrive the row number of a given name. How can i do this..
I would like to store all information on them in this table but that amounts to quite a lot of fields (about 50) and some of these will store a lot of HTML text in them.
Is it best to split the table up for performance reasons or will it make little difference?
