bit type : default to ‘0’ instead of NULL

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Here’s a sample with a non nullable bit column with the default specified, just run the below in Management Studio:

CREATE TABLE #temp
    (
      id INT ,
      myBit BIT NOT NULL DEFAULT 0  -- not null with default of false
    );

INSERT  INTO #temp
        ( id )  -- only insert to id col, the default will set itself
VALUES  ( 123 );

INSERT INTO #temp
        ( id, myBit )
VALUES  ( 456, 1 )  -- this insert adds a true value to override the default

SELECT  *
FROM    #temp;

DROP TABLE #temp;

Produces:

id  myBit
123 0
456 1

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