MySql(二)

2022/8/25 2:23:17

本文主要是介绍MySql(二),对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!

MySql查询

基本数据查询

全表查询

select * from tableName;

查询部分字段

select Field from tableName;

计数1

select count(*) from tableName;

计数2

select count(1) from tableName;

条件过滤

and (并且)

select * from tableName where 条件1 and 条件2;

or(或者)

select * from tableName where 条件1 or 条件2;

in(包含)

select * from tableName where Field in(value1,value2);

between ··· and ···(范围检查)

select * from tableName where Field between a and b;

not (否定结果)

select * from tableName where Field not in(value1,value2);

select * from tableName where Field not between a and b;

%(匹配任意字符)

select * from tableName where Field like "要匹配的字符%";

^(匹配以···开头的字符)

select * from tableName where Field rlike "^要匹配的字符";

$(匹配以···结尾的字符)

select * from tableName where Field rlike "要匹配的字符$";

 



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