Category Archives: t-sql - Page 5

Linked Server Example from Original Site

Posted by on February 28, 2008 Comments Off on Linked Server Example from Original Site

Older article/post on Linked Server functionality in SQL Server 200-2005 and 2K8.

https://jackdonnell.com/articles/linked_Serv.htm

I mostly  use the OpenQuery() select statments to get to MySQL and other platforms. Watch your security Model!

Group By and Case Statements or Other SQL Functions

Posted by on February 28, 2008 Comments Off on Group By and Case Statements or Other SQL Functions

One thing I forget to do often is to include the actual item I’m returning in the Select Statement in the Group By. Meaning , if I use a case statement of some function to change the value that I’m returning, then I should include that and not the base column name in the Group By part of the select statement


/*
If you write something like this and the Col2 has multiple 'Unique' Values
then you will get a row for each value distinct Col2 value that says 'Other'
*/SELECT [Col1]
,Case When [Col2] = 10 then 'Ten'
Else 'Other' End as [LameExample]
,Count(*) as CNT
FROM [dbo].[lameTableExample]
GROUP BY [Col1], [Col2]

-- This Example will return Only two rows

SELECT [Col1]
,Case When [Col2] = 10 then 'Ten'
Else 'Other' End as [LameExample]
,Count(*) as CNT
FROM [dbo].[lameTableExample]
GROUP BY [Col1]
, Case When [Col2] = 10 then 'Ten'
Else 'Other' End

Select Case has a simple overview of using CASE in a SQL Query with the SUM() function.

For Each … SQL System Stored Procedures

Posted by on February 25, 2008 Comments Off on For Each … SQL System Stored Procedures

Sql server has some great built-in commands procs that can help you script server or database wide commands. sp_MSForEachTable and Sp_MSForEachDb

When first looking at a database , I sometimes like to run the following:
execute sp_MSforEachTable @command1=‘Print ”?”; Select Count(*) as [? – (count)] from ?;Select Top 10 * from ? ‘

I used the sp_MSforeachDB just the other day to set all the non-system
databases on a test server to Simple Recovery mode.Just made a quick stored procedure that I passed the ? value and filter out the system databases ( Master, Model, Tempdb and MSDB).

For More Information Checkout :

November 30, 2004
SQL Server Undocumented Stored Procedures sp_MSforeachtable and sp_MSforeachdb
By Gregory A. Larsen
http://www.databasejournal.com/features/mssql/article.php/3441031

Link to Old Articles and Scripts

Posted by on February 23, 2008 Comments Off on Link to Old Articles and Scripts

https://jackdonnell.com/articles/index.htm is still available and has the old links to javascript s, T-SQL scripts, etc.