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MYSQL_02--多表查询select
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MYSQL_02--多表查询select
精选 原创1. 基本语法
select 字段名1,字段名2… from 表1,表2…表n; # 不带条件，对多表查询字段进行排列组合
select 字段名1,字段名2… from 表1,表2…表n where 条件; # 带条件，只会查询到满足条件的值
2. 举例说明
2.1 建表
有两个表，分别为：
dept：
demo：
2.2 查询
SELECT d.realname, t.dname FROM demo as d, dept AS t # 不带条件，对多表查询字段进行排列组合
查询结果：
SELECT d.realname, t.dname FROM demo as d, dept AS t WHERE d.loc = t.loc # 带条件，只会查询到满足条件的值
查询结果：
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