SQL Server Archives - Page 389 of 393 - SQL Authority with Pinal Dave

SQL SERVER – Difference between DISTINCT and GROUP BY – Distinct vs Group By

March 29, 2007

SQL, SQL Performance, SQL Server, SQL Tips and Tricks

This question is asked many times to me. What is difference between DISTINCT and GROUP BY? A DISTINCT and GROUP BY usually generate the same query plan, so performance should be the same across both query constructs. GROUP BY should be used to apply aggregate operators to each group. If…

SQL SERVER – Fix : Error 701 There is insufficient system memory to run this query

March 27, 2007

Pinal Dave

SQL, SQL Performance, SQL Server, SQL Tips and Tricks

SQL Download, SQL Error Messages, SQL Scripts, SQL Server DBCC, SQL Server Security, SQL Stored Procedure

Generic Solution: Check the settings for both min server memory (MB) and max server memory (MB). If max server memory (MB) is a value close to the value of min server memory (MB), then increase the max server memory (MB) value. Check the size of the virtual memory paging file.…

SQL SERVER – @@IDENTITY vs SCOPE_IDENTITY() vs IDENT_CURRENT – Retrieve Last Inserted Identity of Record

March 25, 2007

Pinal Dave

SQL, SQL Performance, SQL Server, SQL Tips and Tricks

SQL Function, SQL Index, SQL Scripts

SELECT @@IDENTITY It returns the last IDENTITY value produced on a connection, regardless of the table that produced the value, and regardless of the scope of the statement that produced the value. @@IDENTITY will return the last identity value entered into a table in your current session. While @@IDENTITY is…

SQL SERVER – Fix: Error Msg 128 The name is not permitted in this context. Only constants, expressions, or variables allowed here. Column names are not permitted.

March 22, 2007

Pinal Dave

SQL, SQL Performance, SQL Server, SQL Tips and Tricks

SQL Download, SQL Error Messages, SQL Scripts, SQL Server Security

Error Message: Server: Msg 128, Level 15, State 1, Line 3 The name is not permitted in this context. Only constants, expressions, or variables allowed here. Column names are not permitted. Causes: This error occurs when using a column as the DEFAULT value of another column when a table is…

SQL SERVER – SQL Commandments – Suggestions, Tips, Tricks

March 20, 2007

Pinal Dave

SQL, SQL Performance, SQL Server, SQL Tips and Tricks

Best Practices, Database, Software Development, SQL Backup and Restore, SQL Constraint and Keys, SQL DateTime, SQL Download, SQL Error Messages, SQL Function, SQL Index, SQL Joins, SQL Server DBCC, SQL Server Security, SQL Stored Procedure

Few days ago, while searching for something on web site, I came across a very good article of 25 SQL Commandments. I really enjoyed reading it. It was for Oracle, I re-wrote it for SQL Server. First 18 points are taken from original article and last 2 I added to…

SQL SERVER – Fix: Sqllib error: OLEDB Error encountered calling IDBInitialize::Initialize. hr = 0x80004005. SQLSTATE: 08001, Native Error: 17

March 16, 2007

Pinal Dave

SQL, SQL Server, SQL Tips and Tricks

SQL Error Messages, SQL Server Security, SQL Utility

Error received: Sqllib error: OLEDB Error encountered calling IDBInitialize::Initialize. hr = 0x80004005. SQLSTATE: 08001, Native Error: 17 Error state: 1, Severity: 16 Source: Microsoft OLE DB Provider for SQL Server Error message: [DBNETLIB]SQL Server does not exist or access denied The simple fix: Microsoft SQL Server 2005 >> Configuration Tools…

SQL SERVER – DBCC command to RESEED Table Identity Value – Reset Table Identity

March 15, 2007

Pinal Dave

SQL, SQL Performance, SQL Server, SQL Tips and Tricks

SQL Index, SQL Scripts, SQL Server DBCC, SQL Server Security

DBCC CHECKIDENT can reseed (reset) the identity value of the table. For example, YourTable has 25 rows with 25 as last identity. If we want next record to have identity as 35 we need to run following T SQL script in Query Analyzer. DBCC CHECKIDENT (yourtable, reseed, 34) If table…