between...and..

语法:

test_expression  BETWEEN begin_expression AND end_expression

例如:
        数据库AA表中有一个字段AA_RQ,声明为,

Oracle版

AA_RQ   VARCHAR2(8),

Sql Server版

AA_RQ   VARCHAR(8),

以下两句话的效果一样:

select * from AA where AA_RQ between '20100101' and '20100104'
select * from AA where AA_RQ >='20100101' and AA_RQ<='20100104'

但如果将上面between...and..中的两个日期互换位置后,如:

select * from AA where AA_RQ between '20100104' and '20100101'

则查不出任何数据(对于Sql Server与Oracle均是如此),所以说:要注意between...and..两个表达式之间的关系。

时间: 2024-09-07 08:52:05