Sql server computed field

SQLServerCentral is supported by Red Gate Software Ltd.

Popular Topics

Home

Members

Calendar

Who's On

Home » SQL Server 2008 » SQL Server 2008 - General » Sql server computed field

Sql server computed field

Rate Topic

Display Mode

Topic Options

Author

Message

cmoloto-996602

Posted Friday, January 22, 2010 12:48 AM

Grasshopper

Group: General Forum Members
Last Login: Monday, March 26, 2012 5:05 AM
Points: 16, Visits: 136

Create table #Test
(
emp_id int
emp_Birth_Date
emp_Age int AS datediff(d,emp_Birth_Date, getdate())
)

....this computed field cannot work....i need the field to automatically calculate the differece and retains number as results.....any help.

thanks.

Post #851782

GilaMonster

Posted Friday, January 22, 2010 2:12 AM

SSC-Dedicated

Group: General Forum Members
Last Login: Today @ 2:33 PM
Points: 37,741, Visits: 30,019

What do you mean by 'cannot work'? Is it giving an error? Is it not giving the values you want? Something else?

Calculated columns are not stored, they're calculated when the column is queried.

Gail Shaw
Microsoft Certified Master: SQL Server 2008, MVP
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass

Post #851831

cmoloto-996602

Posted Friday, January 22, 2010 2:27 AM

Grasshopper

Group: General Forum Members
Last Login: Monday, March 26, 2012 5:05 AM
Points: 16, Visits: 136

giving an error message (Incorrect syntax near the keyword 'AS')

Post #851840

cmoloto-996602

Posted Friday, January 22, 2010 2:32 AM

Grasshopper

Group: General Forum Members
Last Login: Monday, March 26, 2012 5:05 AM
Points: 16, Visits: 136

giving an error message (Incorrect syntax near the keyword 'AS')

Post #851843

GilaMonster

Posted Friday, January 22, 2010 3:03 AM

SSC-Dedicated

Group: General Forum Members
Last Login: Today @ 2:33 PM
Points: 37,741, Visits: 30,019

You don't specify a data type when creating a computed column. The data type depends on the result of the expression.

Create table #Test (
emp_id int,
emp_Birth_Date DATETIME,
emp_Age AS datediff(d,emp_Birth_Date, getdate())
)

Gail Shaw
Microsoft Certified Master: SQL Server 2008, MVP
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass

Post #851861

« Prev Topic | Next Topic »

Permissions