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：