判断数字是否为奇数或偶数

判断数字是否为奇数或偶数，可以参考下面2个自定义函数：

奇数：

 

 
set ansi_nulls on
go
set quoted_identifier on
go
-- =============================================
-- author:      insus.net
-- blog:        https://insus.cnblogs.com
-- create date: 2019-06-02
-- update date: 2019-06-02
-- description: 是否为奇数
-- =============================================
 create function [dbo].[svf_isodd]
 (
    @number int
 )
 returns bit
 as
 begin    
    return case when @number % 2 <> 0 then 1 else 0 end
 end
 go

 

偶数：

 

set ansi_nulls on
go
set quoted_identifier on
go
-- =============================================
-- author:      insus.net
-- blog:        https://insus.cnblogs.com
-- create date: 2019-06-02
-- update date: 2019-06-02
-- description: 是否为偶数
-- =============================================
 create function [dbo].[svf_iseven]
 (
    @number int
 )
 returns bit
 as
 begin    
    return case when @number % 2 = 0 then 1 else 0 end
 end
 go

 

举例说明：

 

;with digits as
(
    select 0 as digit
    union all
    select digit + 1 from digits where digit < 9
)
select [digit],[dbo].[svf_iseven]([digit]) as [even],[dbo].[svf_isodd]([digit]) as [odd] from digits

 

运行结果：