多表查询 关联 查询;
1、内链接 只有相同才会有结果。
select a.name, b.phone from contact as a inner join contactInfo as b on a.uuid = b.uuid
多表查询 关联 查询;
1、内链接 只有相同才会有结果。
select a.name, b.phone from contact as a inner join contactInfo as b on a.uuid = b.uuid
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