Scripts

Technical Article

Full, diff and tlog backups based on recovery mode

    This a script which creates stored procedures that can be executed adhoc or set as sql agent jobs to check the recovery status and generate full, differential or transaction log backupf for each database if the database recovery status is set to full.  We have terabytes of data and set all production databases […]

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2003-06-06

948 reads

Technical Article

blocked  and blocker  spid and details

2 steps:step 1 => create   a table in master database called BlockCheckstep 2 =>  create the stored procedure in master  called  BLOCK_CHECK @database_name varchar(20)What SP  does:-    it gets the  spid that is blocked  + info about it (like what it does  at the moment  it is blocked)-    it gets the spid  that  acts as a […]

(1)

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2003-06-05

732 reads

Technical Article

Improving performance on joins to large tables.

In your tenure as a DBA/developer, you've probably been asked to write dozens of stored procedures similar to this:CREATE PROCEDURE ContactInfo@ContactID intASSELECT c.Name, a.Address, p.PhoneFROM Contact cLEFT JOIN ContactAddress aON c.ContactID = a.ContactIDLEFT JOIN ContactPhone pON c.ContactID = p.ContactIDWHERE c.ContactID = @ContactIDBut there is a more efficient way to write such a query.....particularly if you […]

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2003-06-03

1,426 reads

Technical Article

Find Duplicate Employees, Customers, Etc.

Customers, employees, etc. come and go.  They get entered multiple times in inconsistent formats in databases.This simple script finds the duplicates across multiple formats and is easily modified as needed.  It's so easy, my grandmother could do it. Oops! No offense Grandma.For very large databases, create and join two temp tables indexed on the namedatetring […]

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2003-05-30

215 reads

Technical Article

Show all User-Defined Datatypes for all Databases

This procedure displays all user-defined datatypes in all databases on a server.  Another example of the power of dynamic T-SQL, this procedure dynamically generates SELECT statements for the systypes tables in each database and UNIONs them together so that they display in one recordset.

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2003-05-30

176 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