Question

这不适用于sql server 2005

select * from [mytablename] where [mybitcolumn] <> 1

我必须使用......

select * from [mytablename] where (([mybitcolumn] is null) or ([mybitcolumn]=0))

是否有替代语法可以获得mybitcolum＆lt;＆gt;的行1？

Answer 1

你可以这样做：

select * from [mytablename] where isnull([mybitcolumn], 0) = 0

虽然它只是稍微好一点。

或者，我犹豫不决，你关闭ANSI NULLS。例如：

set ansi_nulls on
go

if (1 != null)
    print 'This will not print equal because NULL is a third boolean value.'

set ansi_nulls off
go

if (1 != null)
    print 'Not equal since we told SQL Server to treat null as any other value'

另请查看Three-valued logic。

Answer 2

由于1被视为true;使用where [mybitcolumn] <> 1，您尝试获取false方案。如果你尝试下面怎么办

select * from [mytablename] where [mybitcolumn] = 'false'

如果mybitcolumn包含NULL，则您可以使用ISNULL功能

select * from [mytablename] where ISNULL([mybitcolumn],0) = 'false'

使用位数据类型列查询Sql Server 2005

2 个答案: