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Join Date: Apr 2012
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Miss

Hi Guys i am havin a problem in sql firstly i wana know dat is data type boolean work in sql, if yes how? if you guys can giv me an example i'b very happy,
thanx
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Join Date: Nov 2004
Posts: 1,364
There is no Boolean data type in SQL Server. One that is often used instead of Boolean is the Bit data type. It can store the values 0, 1 and NULL.

Code:
CREATE TABLE #MyTable(
	Id		INT	NOT NULL,
	TrueBoolean	BIT	NOT NULL	DEFAULT 1,
	FalseBoolean	BIT	NOT NULL	DEFAULT 0,
	UndefBoolean	BIT
)

INSERT INTO #MyTable(Id) VALUES
(1)

SELECT * from #MyTable
--1	1	0	NULL

UPDATE #MyTable
SET TrueBoolean = 0
WHERE UndefBoolean IS NULL
--1	0	0	NULL

SELECT * FROM #MyTable
WHERE FalseBoolean = 1
-- empty result set
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With kind regards . . . . . SQL Server 2000/2005/2012 Earned beers: 16
Wim
Beware of bugs in the above code; I have only proved it correct, not tried it. -- Donald Knuth
Grabel's Law: 2 is not equal to 3 -- not even for very large values of 2.
Pat Phelan's Law: 2 very definitely CAN equal 3 -- in at least two programming languages
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