Scripts

Technical Article

How to get ColumnNames, datatypes and length

This is a followup to the script submitted by srallapalli. One can return a record set of all tables in a database using the following:USE MyDatabaseSELECT so.name AS TableName, sc.name AS ColumnName,  st.name AS ColumnDatatype,  convert(int, sc.length) AS ColumnLength FROM syscolumns sc, sysobjects so , systypes st WHERE so.type='U' AND OBJECTPROPERTY(so.id,'ismsshipped') = 0 AND sc.id=so.id […]

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2003-05-10

158 reads

Technical Article

Generate "CREATE...FOR ATTACH" stmt. dynamically

In instances where you have over 16 data files, or you need to move data files to a new location when you are moving a database you must use a CREATE...FOR ATTACH statement.  This script will generate the CREATE...FOR ATTACH statement dynamically given a database name.  It will take into consideration the file sizes, growths […]

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2003-05-07

246 reads

Technical Article

Restrict simultaneous access to resources

This set of procedures allow you to control simultaneous access to any resource you are using. It mimics the behaviour of a Semaphore in programming.A typical problem where you need this, is when you have a computational intensive procedure you only want to be started a limited number of times.First, add a record to the […]

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2003-05-07

294 reads

Technical Article

Returning data with col number

This script enables you to return data from SQL Server's table without specyfing the name of the column .All you only need to supply is the column number, that you want the data from. In the example we want to chose all rows from the second column (categories table - northwind) Column number is based […]

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2003-05-07

179 reads

Technical Article

UDF to get first date or trim time for Datepart.

Not long ago I was in a forum discussion when someone presented another way to get the date with time value of midnight by doing similar to thisDATEADD(dd,DATEDIFF(dd,0,@DATE),0)Which I find is much cleaner than any other option I have seen or tried myself. Seeing this I realized there are many other dates that can be […]

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2003-05-02

497 reads

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Question of the Day

Getting the Average

I have this data in the dbo.Commission table in a SQL Server 2022 database.

salesperson commission
Brian       12
Brian       16
Andy        7
Andy        14
Andy        21
Steve       20
Steve       NULL
All the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
     , AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
 FROM commission
 GROUP BY SalesPerson
GO
What average commission is calculated for Steve?

See possible answers