Sql Server has many data types.
For Example:
smallint
Integer data from -2^15 (-32,768) through 2^15 - 1 (32,767). Storage size is 2 bytes.
I want to know that
If it contains like 0 or 100 or 1000 or -200 or -2000 or more or less.
What will its actual size?
2 bytes or change with the value.
Please also mention the reference with your answer. if available.
The Tabular model is showing 19 GB on disk, but it is acquiring around 40 GB in memory.
View 3 Replies View RelatedHi,
An MSSQL DB running SAP indicates a smaller DB size (MMC & SAP) than the actual physical size. The difference is about 8 GB.
A lot of records were deleted before this. Did they remain in the DB as NULL values or something ?
Does anyone know what the reason for this could be ? And how to clean this up ?
Thanks in advance,
Paul
Hi,
How do I check what is the actual DB size that is currently being use?
e.g. I set 10 GB as initial size. A few days and a few transactions later, how can I know how much was used since it is still under 10GB and checking the physical DB file will not tell me anything.
Microsoft OLE DB Provider for ODBC Drivers error ' 80040e14'
[Microsoft][ODBC SQL Server Driver][SQL Server]Updated or inserted row is bigger than maximum size (1962 bytes) allowed for this table.
database:microsoft 6.5 SQL
How can I solve this problem
thanks,shay
Hello ,
I would like to know the size in bytes required internally for each datatype MSSQLServer supports.
For eg.
I think for SMALLINT its 2 bytes
Would like to know the size in bytes for
SMALLINT, INTEGER, REAL, VARCHAR, DATETIME, IMAGE, DECIMAL
Thanks..
Here is my code:
Dim oParameter As New System.Data.SqlServerCe.SqlCeParameter("@pMyParameter", SqlDbType.Binary, 3000)
If you set a watch on this object, the size is set back to 510. I have tried resetting the size back to 3000 after construction using oParameter.Size, but it doesn't change from 510. If the command is executed using ExecNonQuery, this causes the bytes to get cut off at 510 bytes and returns the error: Byte array truncation to a length of 510.
Can I insert data into SQL Server 2005 Mobile Edition, into a field of data type binary(3000) using .NET CF 2.0 via SqlServerCe objects?
Thanks for any help.
Kirk
Hi Everybody,
I like to compute the actual physical database file size using queries.
From the EM database properties, the file size shown is not matching with the master..sysaltfiles.size
Ex. Actual file size is 12MB and 1MB for MDF & LDF respectively.
'sysaltfiles' shows 1464 & 96 resp. Since they are shoing it as 8K Pages,
96*8 = 768KB is not matching with 1024KB for the LDF file.
Is there any overheads (additional space from the physical file for file headers) allocated?
Thanks
Babu
Need to know the actual size on the tape drive
Im using LTO3 tape drive (400GB) the used media is for LTO2, currently Im looking for LTO4(1.6TB) but I need the backward compatibility to support LTO3 tapes so I can go for LTO2 media or LTO3 media.
I need to know the size of the database backup (Ms SQL2005 SP1 x64-bit, on Ms Windows 2003 R2 x64-bit) on the tape drive. I can see the backup size of the database but not the size on the tape which is using hardware compression.
Is there a way or a tool to view that.
What is the easiest way to calculate the space (size in bytes) used by a BLOB column that is already stored in a particular row?
Thanks.
Hi,
Im trying to create a VERY wide table, with 1,000 columns of type varchar(MAX), nullable.
The CREATE TABLE statement (both in SQL 2005 & 2008), gives the following warning:
Warning: The table "WIDE_TABLE" has been created, but its maximum row size exceeds the allowed maximum of 8060 bytes. INSERT or UPDATE to this table will fail if the resulting row exceeds the size limit.
When I insert data into the table, filling all columns with small, 10-byte string values, I get the following error:
Msg 50000, Level 16, State 1, Procedure sp_pivot, Line 118
Cannot create a row of size 15034 which is greater than the allowable maximum of 8060.
Id like to verify this observation: each row is created with 2000 bytes of offset data (2 byte * 1000 columns), 125 bytes for null bitmap (1000 columns / 8 bits) and some more wasted? row information. This leaves less than 6K for the data itself. But since not all columns can fit within the page, forwarding pointers in the row need to be created, 24 byte per column, which very quickly add up to more than 8K, thus the error. So the 8K limit is met for much less columns than the max 1024 column restriction.
Furthermore, in SQL 2008, SPARSE columns will not solve the problem (maybe save some metadata? space in case the columns are null, but if not, Im with the same problem again, or even worse, since now each value takes more storage space. The max 30,000 columns in 2008 is only for cases where the column values are really sparse¦
Is this the right observation? if so, is there a workaround besides splitting to multiple tables?
Thanks,
Aviv.
Howdy folks! (I feel im creating too many topics...but all my questions are unrelated :-/)
Dev environment: SSCE, Native c++ OLE code, Win CE 5
I have a routine that calculates the size of a set of columns in order to create a byte buffer for retrieving data from an IRowset and inserting it into a custom class. This method works great for all data types except ntext. When I look at the column information from an ntext field, the DBCOLUMNINFO::ulColumnSize member holds 536,870,911 (the max length of an ntext type). Obviously I dont want to allocate 1GB of memory for each ntext column. Is there anyway (natively) to determine the actual number of characters in a field?
I have some code I build 2 weeks ago which Iāve been running daily but itās suddenly stopped working with the following error.
āThe table "tbl_Intraday_Tmp" has been created, but its maximum row size exceeds the allowed maximum of 8060 bytes. INSERT or UPDATE to this table will fail if the resulting row exceeds the size limitā When I google this there seems to be a related to tables with vast numbers of columns.
My table tbl_Intraday_tmp is relatively small. It has 7 columns. 1 of varchar(5), 3 of decimal(9,3) and 2 of decimal(18,0). The bit Iām puzzled with is it was working and stopped.
I donāt recall changing anything but I wouldnāt rule that out. I āve inspected the source files and I donāt believe they have changed either.
DECLARE Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā
@FileName varchar(50),
@Path varchar(50),
@SqlCmd varchar(1000)
= '',
@ASXCode varchar(5),
@Offset decimal(18,0),
[code]....
I am using MS SQL server 2008, and i have a table with 350 columns and when i m trying to create one more column its giving error with below message -
Warning: The table XXX has been created, but its maximum row size exceeds the allowed maximum of 8060 bytes.
INSERT or UPDATE to this table will fail if the resulting row exceeds the size limit.
how can i resolve this?
I have a view in SQLServer 2005. It took 30 sec. to finish. Then I deleted 4500 records from one table that is used in view. It took 90 sec. to finish now. I did a comparison on Actual Execution Plan between before I deleted data and after I deleted data, they are almost same, only different is Actual Number Rows become less after deleted data. So, I wonder why data become less but time become more. When I look closely on the Actual Execution Plan, the ridiculous thing is, there are only Estimated Operation Cost on each step, no Actual Operation Cost. I guess there are something wrong with optimizer because reuse same Execution Plan, but how can I tell which step wrong without Actual Operation Cost.
Thanks!
Henry
In vb.net what kind of data can I inject in a smallInt lenght 2 Data Type? Right now I am trying to pass an integer to my SP and it gives me the error "Error converting data type nvarchar to smallint" So I guess that I am not passing the right type of data or I have to cast it?
Thanks
cmdSelect.Parameters.Add("@CustomerId", "iCustomerId")
I have a dbfield which holds a smallint value for the time eg. 1406 . I have to add this value to a datetime value in another field but need the result as a datetime value.
The result would be time(int) + date(datetime) = datetime(datetime).
I need this to compare the hours between delivery and dispatch.
Thanks for your help
P
Hi,
I get smthing I did not expected from the following query.
Code Block
SELECT DATEDIFF(month, datediff( month , LoanApplication.DecidedOnCU,GETDATE()), LoanApplication.Term)
FROM LoanApplication
data type of LoanApplication.Term field is smallint
Values are like 60,20,48 etc.
data type of LoanApplication.DecidedOnCU is date time.
Is it a problem? If so How can I fix this ?
Final answer I want to get from this query is remaining months. Ex: 14, 20 etc.
Thanks
For a SQL statement in an Alias column I am am combing severalcolumns.But I am having problems with one column as it is a smallint.I get this errorSyntax error converting the nvarchar value to a column of data typesmallintMy Sql statement "Select Stilngcol1 + stringcol2 + intcol1 + stringcol3 As NewColNamefrom Table1I was wondering is there anyway to format/convert the smallint tonvarchar, without changing the database.
View 3 Replies View RelatedNewbie question regarding a db I have inherited. A table FullDocuments has a DocNo column with smallint data type and a SequenceNo column also with smallint data type.DocNo
has numbers that represent persons. SequenceNo has numbers that
represent specific documents associated with each person (DocNo).So DocNo 5 and Sequence 3 represents the 3rd document associated with person 5.My SELECT statement looks like this:SELECT ReadingNo, SequenceNoThis returns data like this: 5 3I would like to concatenate the SELECT statement to return like this: 5-3So I made Sql like this:SELECT ReadingNo + '-" + SequenceNo Which
returns a alias ('No Column Named') result value of 8 which is an
arithmetic result instead of a string concatination that I want.So my questions are:1.
Should the original database designer have used string data types for
these columns since they will never be used for math purposes?2.
Do I need to cast them to string data type (like nchar(4) - since
neither column will ever exceed 4 digits) to get the result I desire?3. Or can I keep them as smallint and modify my SELECT statement to allow concatination yielding a string result?
Is an index based on a smallint (16 bit) really faster than an index based on an int (32 bit)
If so, how much...
Four tables
Table A: ID smallint (PK)
Text varchar(50)
Table B:ForeginID smallint (indexed - non unique)
Text varchar(50)
rowID int (PK)
Table C: ID int (PK)
Text varchar(50)
Table D:ForeginID int (indexed - non unique)
Text varchar(50)
rowID int (PK)
Table A and C contain identical data
Table B and D contain identical data
(Tables A and B were filled and then copied to Tables C and D)
Tables A/C are loaded with 64,000 records (-32,000 to 32,000)
Tables B/D are loaded with 6,400,000 records ForeginID loaded randomly with values between -32,000 and 32,000
The purpose of this test is to find out if identical queries joined on a smallint are actually faster than int based.
I ran 3 queries on each set:
- Full select
- Select on ID/Foregin ID
- Select on Table2 RowID joined to table 1
Here are the queries:
#1. Full select (smallint) - grouped to limit result set
-----------------------------------------------------------
SELECT intAID, COUNT(intBID)
FROM TESTintA
INNER JOIN TESTintB ON intAID = intBID
GROUP BY intAID
ORDER BY COUNT(intBID) desc
#2. Select on ID/Foregin ID (smallint)
------------------------------------------
SELECT intAID, intBID, strATXT, strBTXT
FROM TESTintA
INNER JOIN TESTintB ON intAID = intBID
WHERE intAID = 29120
#3. Select on Table2 RowID joined to table 1 (smallint)
------------------------------------------
SELECT intAID, intBID, strATXT, strBTXT
FROM TESTintA
INNER JOIN TESTintB ON intAID = intBID
WHERE intPK = 1050
#4. Full select (int) - grouped to limit result set
------------------------------------------
SELECT lngCID, COUNT(lngDID)
FROM TESTlngC
INNER JOIN TEXTlngD ON lngCID = lngDID
GROUP BY lngCID
ORDER BY COUNT(lngDID) desc
#5. Select on ID/Foregin ID (int)
------------------------------------------
SELECT lngCID, lngDID, strTXTC, strTXTD
FROM TESTlngC
INNER JOIN TEXTlngD ON lngCID = lngDID
WHERE lngCID = 29120
#6. Select on Table2 RowID joined to table 1 (int)
------------------------------------------
SELECT lngCID, lngDID, strTXTC, strTXTD
FROM TESTlngC
INNER JOIN TEXTlngD
ON lngCID = lngDID
WHERE intPK = 1050
Here are the results: (run multiple times to verify)
#1. Full select (smallint) - grouped to limit result set
-----------------------------------------------------------
(8 seconds) - before computing statistics on table
(13 seconds) - after computing statistics on table
#2. Select on ID/Foregin ID (smallint)
------------------------------------------
(0 seconds)
#3. Select on Table2 RowID joined to table 1 (smallint)
------------------------------------------
(0 seconds)
#4. Full select (int) - grouped to limit result set
------------------------------------------
(8 seconds) - before computing statistics on table
(7 seconds) - after computing statistics on table
#5. Select on ID/Foregin ID (int)
------------------------------------------
(0 seconds)
#6. Select on Table2 RowID joined to table 1 (int)
------------------------------------------
(0 seconds)
Conclusion: Not only is there a negligible difference in select performance, generating stats on the smallint actually makes it slower.
(perhaps there is some kind of conversion going on here behind the scenes?)
Hi all,
I found a UDF on the web to validate INT data contained in a VARCHAR field:
http://blog.sqlauthority.com/2007/08/11/sql-server-udf-validate-integer-function/
I modified it to accept NULL values and conform more closely to INT specification. Here is my modified function:
CREATE FUNCTION [dbo].[udfIsValidINT]
(
@Number VARCHAR(100)
)
RETURNS BIT
BEGIN
DECLARE @Ret BIT, @ShiftByOne INT;
IF LEFT(@Number, 1) = '-'
SELECT @Number = SUBSTRING(@Number, 2, LEN(@Number)), @ShiftByOne=1;
SELECT @Number = COALESCE(@Number,'0'), @ShiftByOne = COALESCE(@ShiftByOne,0)
IF (PATINDEX('%[^0-9-]%', @Number) = 0
AND CHARINDEX('-', @Number) <= 1
AND @Number NOT IN ('.', '-', '+', '^')
AND LEN(@Number)>0
AND LEN(@Number)<11
AND @Number NOT LIKE '%-%')
SELECT @Ret = CASE WHEN CONVERT(BIGINT,@Number) - @ShiftByOne <= 2147483647
THEN 1 ELSE 0 END
ELSE
SET @Ret = 0
RETURN @Ret
END
GO
SELECT dbo.udfIsValidINT('2147483648')
SELECT dbo.udfIsValidINT('2147483647')
SELECT dbo.udfIsValidINT('-200')
SELECT dbo.udfIsValidINT('-2147483649')
SELECT dbo.udfIsValidINT('32900')
SELECT dbo.udfIsValidINT('1.79E+308')
GO
I also have a separate function for SMALLINT:
CREATE FUNCTION [dbo].[udfIsValidSMALLINT]
(
@Number VARCHAR(100)
)
RETURNS BIT
BEGIN
DECLARE @Ret BIT, @ShiftByOne INT;
IF LEFT(@Number, 1) = '-'
SELECT @Number = SUBSTRING(@Number, 2, LEN(@Number)), @ShiftByOne=1;
SELECT @Number = COALESCE(@Number,'0'), @ShiftByOne = COALESCE(@ShiftByOne,0)
IF (PATINDEX('%[^0-9-]%', @Number) = 0
AND CHARINDEX('-', @Number) <= 1
AND @Number NOT IN ('.', '-', '+', '^')
AND LEN(@Number)>0
AND LEN(@Number)<6
AND @Number NOT LIKE '%-%')
SELECT @Ret = CASE WHEN CONVERT(INT,@Number) - @ShiftByOne <= 32677 THEN 1 ELSE 0 END
ELSE
SET @Ret = 0
RETURN @Ret
END
GO
SELECT dbo.udfIsValidSMALLINT('589')
SELECT dbo.udfIsValidSMALLINT('-200')
SELECT dbo.udfIsValidSMALLINT('-32900')
SELECT dbo.udfIsValidSMALLINT('32900')
SELECT dbo.udfIsValidSMALLINT('1.79E+308')
and one for TINYINT:
CREATE FUNCTION [dbo].[udfIsValidTINYINT]
(
@Number VARCHAR(100)
)
RETURNS BIT
BEGIN
DECLARE @Ret BIT, @L TINYINT;
SET @L = LEN(@Number);
SET @Number = COALESCE(@Number,'0');
IF (PATINDEX('%[^0-9]%', @Number) = 0
AND @L>0
AND @L<4)
SELECT @Ret = CASE WHEN CONVERT(SMALLINT,@Number) < 256 THEN 1 ELSE 0 END
ELSE
SET @Ret = 0
RETURN @Ret
END
GO
SELECT dbo.udfIsValidTINYINT('256')
SELECT dbo.udfIsValidTINYINT('-1')
SELECT dbo.udfIsValidTINYINT('0')
SELECT dbo.udfIsValidTINYINT('255')
SELECT dbo.udfIsValidTINYINT('1.79E+308')
And, finally, a separate function for DECIMAL validation:
CREATE FUNCTION [dbo].[udfIsValidDECIMAL]
(
@Number VARCHAR(100),
@Scale TINYINT,
@Precision TINYINT
)
RETURNS BIT
BEGIN
DECLARE @Ret BIT, @L TINYINT, @DSI TINYINT;
SET @Number = COALESCE(@Number,'0');
IF LEFT(@Number, 1) = '-'
SELECT@Number = SUBSTRING(@Number, 2, LEN(@Number));
SET @L = LEN(@Number);
SET @DSI = @L - LEN(REPLACE(@Number,'.',''))
IF(
PATINDEX('%[^0-9.]%', @Number) = 0
ANDCHARINDEX('-', @Number) = 0
AND@DSI <= 1
AND@L>0
AND@L<=@Scale+@DSI+ CASE @DSI WHEN 1 THEN @L-CHARINDEX('.', @Number) ELSE 0 END
AND @Scale - @Precision >= CASE @DSI WHEN 1 THEN CHARINDEX('.', @Number) - 1 ELSE @L END
)
SELECT @Ret = 1
ELSE
SET @Ret = 0
RETURN @Ret
END
GO
SELECT dbo.udfIsValidDECIMAL('256',2,0)
SELECT dbo.udfIsValidDECIMAL('-1',1,0)
SELECT dbo.udfIsValidDECIMAL('10.123456789123456789',18,17)
SELECT dbo.udfIsValidDECIMAL('10.123456789123456789',18,16)
SELECT dbo.udfIsValidDECIMAL('-255.0000000000000001',3,0)
SELECT dbo.udfIsValidDECIMAL('1.79E+308',9,2)
Node that the DECIMAL validation function specifically tests whether the input number can legally convert to a given decimal scale and precision. Converting a value of 0.234234 over to DECIMAL(1,0) will work, but SQL will truncate the actual decimals to fit it in that space. However, it will throw an error if you have too many whole digits.
On the whole, I was rather rushed to get these created, so there may be some errors I didn't notice. I'm interested in any improvements you guys can make to improve performance or make them cleaner.
Thanks for looking!
- Shane
I need to insert rows into a table which contains a smallint field
for time. The times are stored in that colum as integers (898,
11345, 1259, etc.) How can I enter a time like 9:15 AM into this field? I know how to display integer data in hh:mm format but I'm stumped on how I can do the reverse.
Thanks for any help offered.
A SQL Server 2005 db has three date related-columns (MonthGiven,
DayGiven, YearGiven) each as smallint datatype. I would like to
create a DocDate column (datetime datatype) that combines the data from
the three existing date-related columns. I have tried casting and
simple concatentation without success. ALTER TABLE Details ADD DocDate DateTime NULL
UPDATE Details SET DocDate = CAST(MonthGiven AS DateTime)+ '/' + CAST(DayGiven AS DateTime) + "/" Cast(YearGiven As DateTime)
I think I need to be doing a Conversion instead of casting but
have been unable to implement info I have found in the SQL Server
Developer Center in my situation.
Hi,
I need to change the datatype of a very large table from smallint to int...
What would be an ideal solution to get this done in least amount of time. May be I can try with ALTER but , I am not sure about the time it would take ...and the page splits etc..
pls help on the same!!
Thanks
Cheriyan.
UPDATE P Ā Ā
SET Ā
P.IsError=1
,P.IsDrawingRevNo=1Ā
,ErrorMessage=ISNULL(ErrorMessage,'')+'| DrawingRevisionNumber DataType Is Not Valid, smallint expected(-32768 AND 32767)'
FROM ZPTSMGR.ProjectDrawingRaw P
WHERE Ā P.LogId=@LogId AND Ā P.ProjectId=@ProjectId AND Ā P.Revision > 32767 Ā (P.Revision Ā NOT BETWEEN Ā -32768 AND 32767) Ā --SMALLINT RANGE Ā -32768 to 32767.
--DataType Range
--tinyint DataType Ā (MinVal: 0, MaxVal: 255). Its storage size is 1 byte.
--smallint DataType from -2^15 (-32,768) through 2^15 - 1 (32,767) and its storage size is 2 bytes.
--int DataType Ā -2^31(-2,147,483,648) to 2 ^31-1(2,147,483,647). Its storage size is 4 bytes.
--Bigint DataType -- from -2^63 (-9223372036854775808) through 2^63-1 (9223372036854775807). Its storage size is 8 bytes.
The SQl statement fails, and not able to update it. TheĀ IsError flag need to set since the value does not lies in given range of smallint.--------say 457896523 which is not a small int value
I am trying to resize a database initial log file from 500M to 2M. Im 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 doesnt keep the changes.
Any help with this process?
SQL 7
One of my programmers brought an error to me that I need to get some clarification on ...
Its says:
The total row size (24301) for table xxxx eceeds the max number of bytes per row(8060). Rows that exceed the max number of bytes will not be added.
Thoughts ...
Hi,
I used to write the data in a database throught the component. Few days it worked fine and suddenly one day it showed the database is suspect and the file size is 0 bytes but actually is should have written lots of data.
But i have the datafile which shows zero bytes and when i try to attach it it gives an error:
Server: Msg 823, Level 24, State 6, Line 1
I/O error 38(Reached the end of the file.) detected during read at offset 0000000000000000 in file 'D:EorderdatabasePritamdbeorderpritamdb_Data.mdf'.
Connection Broken
Can anyone tell y is this. And it would be really if anyone can tell how to recover the data. The only thing which i have now is the data file which shows zero bytes.
Thanks.
I tried to ALTER TABLE calendar NOCHECK CONSTRAINT ALL and I got this error:
Warning: The table 'messages' has been created but its maximum row size (8321) exceeds the maximum number of bytes per row (8060). INSERT or UPDATE of a row in this table will fail if the resulting row length exceeds 8060 bytes.
I'm not too certain what this error means so I manually deleted the records in this table. I got the same error.
How to count how many bytes were taken per row in certern table?
Which method is the most correct and directly?
Thanks
I'm taking a look at a server to optimize it and need a better understanding of the Memory Available Bytes.
If the graph is showing this @ 100 is that a good or bad thing.
Articles are saying it shouldn't be below 4MB...
Can anyone elaborate?
thanks,
Jonathan
My database has chinese characters in.
Eventually I need to only get the first 50 bytes of the data field, but somehow, I use len('==data==',50), it would catch 50 chinese characters which make 100 bytes ...
can anyone help me?
Thank you very much no matter what the result is ;)