between...and..
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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。
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