How to Change Data type of Column containing 100 Rows

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SQL-Server-2012

Hi i want to change Datatype of Column from int to numeric(18,2) without Dropping the table

plz help
in designer and query

Posted 7-Apr-14 7:56am

Sachin MCA2012

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Richard C Bishop 7-Apr-14 13:58pm

If you change it and try to save and it says you have to drop it to make that change, that is what you have to do.

Sachin MCA2012 7-Apr-14 14:02pm

no i dont want to drop the table and re-create

Sergey Alexandrovich Kryukov 7-Apr-14 14:13pm

Develop a solution doing it for 99 rows. It will be applicable to 100 rows as well.
—SA

2 solutions

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OriginalGriff · Answer 1 · 2014-04-07T08:05:00

INT to NUMERIC is simple:

SQL

ALTER TABLE MyTable
ALTER COLUMN MyInt numeric(18,2)

If you get an error

The object 'DF_MyTable_MyInt' is dependent on column 'MyInt'.

Then edit your table definition, and remove any DEFAULT value first - SQL creates an automatic constraint on columns with DEFAULT values set. You can always add the Default value back afterwards with a NUMERIC value.

Raul Iloc · Answer 2 · 2014-04-07T08:08:00

Solution 2

you should run a query like the next one:

SQL

Alter table dbo.TableTest Alter Column test numeric(18,2)

Posted 7-Apr-14 8:08am

Raul Iloc