Here are the constraints as a result of the query
SELECT * FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE WHERE TABLE_NAME = 'history' CONSTRAINT_NAME COLUMN_NAME ORDINAL_POSITION PK_history userKey 1 PK_history name 2
Here is the result of the query
SELECT * FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE TABLE_NAME = 'history' CONSTRAINT_NAME CONSTRAINT_TYPE IS_DEFERRABLE INITIALLY_DEFERRED PK_history PRIMARY KEY NO NO
My host provides an interface to my SQL Server DB via ASP.NET Enterprise Manager.
I have 3 columns in my
userId(key, int, NULL not allowed)
name(key, string, NULL not allowed)
id(not key, int, NULL allowed)
I want to make the id column the only key.
To do that, I believe I need to:
However, when I use the UI provided, it never works. Sometimes it'll just look like it tries to do something but it never changes when I refresh the view of the columns. It occasionally creates a temp table that looks like it tried to do some of the operation, but that never gets copied/overwrites the original table that I'm trying to change.
When I try using a query, the changes don't show up either. Here are the queries I think I need:
SELECT * from history WHERE id is NULL <---- This shows 0 results ALTER TABLE history ALTER COLUMN id int NOT NULL ALTER TABLE history ADD PRIMARY KEY (id) ALTER TABLE history DROP CONSTRAINT userId DROP CONSTRAINT name GO
I've only gotten to the attempt to disallow NULLs and to add the primary key for the id column. It doesn't seem to work. Can someone point me in the right direction? Thanks!
This question is related to
Assuming that your current primary key constraint is called pk_history, you can replace the following lines:
ALTER TABLE history ADD PRIMARY KEY (id) ALTER TABLE history DROP CONSTRAINT userId DROP CONSTRAINT name
ALTER TABLE history DROP CONSTRAINT pk_history ALTER TABLE history ADD CONSTRAINT pk_history PRIMARY KEY (id)
If you don't know what the name of the PK is, you can find it with the following query:
SELECT * FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE TABLE_NAME = 'history'