Question

Lets say I declare a table variable with some columns in it.

declare @MyContacts table (

//column definitions in it

);

Lets say I have a columnA in it, how can I index it in SQL server 2008.

Answer 1

Creating an index on a table variable can be done implicitly within the declaration of the table variable by defining a primary key and creating unique constraints. The primary key will represent a clustered index, while the unique constraint a non clustered index.

DECLARE @Users TABLE
(
    UserID  INT PRIMARY KEY,
    UserName varchar(50),
    UNIQUE (UserName)
)

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