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Mysql基础第十八天,链接表

绣文字 2022-10-14 阅读 61


关系表

Mysql基础第十八天,链接表_内连接

select p.prod_id,prod_name,p.vend_id,v.vend_name from products p join
vendors v on p.vend_id = v.vend_id; // 默认内连接

创建连接

select p.prod_id,prod_name,p.vend_id,v.vend_name from products p left join
vendors v on p.vend_id = v.vend_id;
select p.prod_id,prod_name,p.vend_id,v.vend_name from products p right join
vendors v on p.vend_id = v.vend_id;


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