jQuery Show Popup on Page Load

7 Sep 2013

How to Drop Primary Key Constraint

Here I described how to drop primary key form table. There are two way for doing this. 

One is when we are not providing constraint key name during creating table.
Second is given constraint name during creating table.

Without giving constraint key

 
First create a table in SQL server with primary key only like below code.
create table info
(
id int primary key,
[name] varchar(50) not null,
address varchar(50) not null
)
 
Copy the key value from created table ‘Keys’. This key automatic created by sql server.
How to Drop Primary Key Constraint
Write code for drop primary key
alter table info
drop PK__info__1A14E395
 

With giving constraint key

Create table like below
create table info
(
id int,
[name] varchar(50) not null,
address varchar(50) not null
constraint pk_info_id primary key clustered(id asc)
)
 
Drop primary key
alter table info
drop pk_info_id

No comments:

Post a Comment