概念:根据连接条件从多个表中查询选择数据,显示这些表中与连接条件相匹配的数据行,组合成新的记录.
语法:select [column_list]
FROM t1
INNER JOIN t2 ON [连接条件1]
INNER JOIN t3 ON [连接条件2]
...
WHERE where_conditions; where t1.status = '否';
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