How do I define a column to be a primary key in tsql?

How do I define a column to be a primary key in tsql?

How do I define a column to be a primary key in tsql?

Search for: How do I define a column to be a primary key in tsql?

tsql identity column and primary key

Search for: tsql identity column and primary key

You don't need to define the identity column as the primary key

There is only one primary key in a table

Primary key ensures that each row is unique in a meaningful way

Example: the name of an entity may be unique and hence primary

There can be alternate constraints that are unique or every foreign constraints


right click on table
design
righ click on column row
set primary key

for prepopulated data don't use identity column. Instead explicitly populate the identity column.

On the other hand when the entities are created through admin panels then you MAY use the identity column.

Even in case of admin panels the entities are limited in number you may want to consider using names or other explicit keys.

When the entities are large and hence anonymous then identity column may serve better.

Note: I am not an expert in this area.

See the notes here for doing i through the code