How to delete only perticular column values from database ?

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SQL-Server-2008R2

I want delete only perticular column values from without affecting any other column in the database . How can I achive this?

Posted 20-Apr-14 23:14pm

Ni!E$H_WAGH

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Bh@gyesh 21-Apr-14 5:22am

Do u mean to say delete column of delete a row based on some column value?

2 solutions

Solution 1

Like this:

SQL

ALTER TABLE table_name
DROP COLUMN column_name

http://www.w3schools.com/sql/sql_alter.asp[^]

Btw, is Google [^]broken at your place?

Posted 20-Apr-14 23:16pm

Manas Bhardwaj

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OriginalGriff · Accepted Answer · 2014-04-20T23:21:00

Manas BHardwaj solution will work, but it deletes the column from the database as well as the values it contains. So if any of your other software uses that column, it will fail when it tries to access it.

It may be that you want to get rid of the values in the column only: that's also pretty simple.
Assuming the column is NVARCHAR:

SQL

UPDATE myTable SET MyColumn=''

Will remove all the values.
If the column is NULLABLE, then:

SQL

UPDATE myTable SET MyColumn=NULL

Is a better solution.