This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
SQL Server how to drop identity from a column
How I alter a Table by script to remove autoindenty of a column?
Add new NON-autoincrementing column of the same type with default constraint to your identity column
drop default constraint
drop identity column
rename new column to old one with sp_rename
Related
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conditional unique constraint
(7 answers)
SQL can I have a "conditionally unique" constraint on a table?
(5 answers)
Partial value constraint of sql server table
(1 answer)
Closed 11 months ago.
I have a SQL Server table tbl_Submissions which contains a number of records for any given CaseID. Each Submission has an AuthorisedStatus field which can be "Authorised", "Rejected", "Rescinded". There could be multiple rejected or rescinded submissions for a CaseID, but there can only ever be one authorised record.
Is it possible to add a constraint or index to enforce this?
It could be implemeneted using filtered index:
CREATE UNIQUE INDEX udx ON tbl_Sumbissions(CaseID)
WHERE AuthorisedStatus = 'Authorised'
This question already has answers here:
Remove Identity from a column in a table
(11 answers)
Closed 5 years ago.
I am trying to edit a table structure. I have a table that contains a primary key and its identity specification is true. I want to change the primary key's identity specification to false using a query as long as I want to run this query on the user's program as I can't go for every user's PC and change it from the designer ... I just want a query to change it from identity specification true to false.
Can I use
alter table table1 set table1ID INT NOT NULL PRIMARY KEY
1- Adding New Column First -
alter table tablename add columnname int
2- Copying the data from identity to column to new column added using above query -
update tablename set columnname = identitycolumnname
3- Now Dropping identity column -
alter table tablename drop column identitycolumnname
4- Finally renaming a new column inserted to a identity Column name
EXEC sp_RENAME 'tablename.columnname' , 'identitycolumnname', 'COLUMN'
This question already has answers here:
How to Alter a table for Identity Specification is identity SQL Server
(3 answers)
Closed 8 years ago.
I have an existing table MCheckTypes and it has a primary key column ID. What I want to do is to alter the table to add identity type on the primary key. I don't want to drop a table and recreate a new one. I already google it but no luck. Below is my script
ALTER TABLE MCheckTypes
ALTER COLUMN [ID] INT IDENTITY(1, 1) NOT NULL
below is the error message
Msg 156, Level 15, State 1, Line 1
Incorrect syntax near the keyword 'IDENTITY'.
You cannot "convert" an existing column into an IDENTITY column - you have to create a new column as INT IDENTITY:
ALTER TABLE MCheckTypes
ADD NewID INT IDENTITY (1, 1) NOT NULL;
This question already has answers here:
SQL Server, How to set auto increment after creating a table without data loss?
(7 answers)
Closed 6 months ago.
I need to ALTER a column but I don't want to drop the table or column and re-create it. Is there a way to achieve this?
There isn't a way to do this, sorry. If you want to add the IDENTITY property to an existing column, you're going to have to drop something (either the table or the column).
It is not possible without dropping column or table.
I suggest following scenario for making identity for column:
1) Drop all indexes/constraints
2) Create temporary table from your table
3) Delete all data in your table
4) Drop and recreate column with identity
5) Populate your table from temporary table (note you need use set identity_insert)
6) Create indexes and constraints you deleted
7) Drop temporary table
Yes you can do this using SQL Server Management Server.
Go to Tools -> Options -> Design -> Table and Database Designers.
From here uncheck "Prevent saving changes that require table re-creation".
Refer to the image attached here
This question already has answers here:
SQL Server add auto increment primary key to existing table
(16 answers)
Closed 8 years ago.
How to alter column in the existing table for the primary key and identity. I tried below query but showing Incorrect syntax near the keyword 'identity'.
alter table IAM_Software_Licence_Master
alter column SoftwareLicId int identity(1,1) primary key
How can I achieve this..
Its difficult to say what the issues are with changing this on your end as I do not know the table structure or whether or not this is used as a foreign Key. But the below link should give you everything you need:
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/04d69ee6-d4f5-4f8f-a115-d89f7bcbc032/how-to-alter-column-to-identity11