資料庫摘要 6 Sql Inner

inner join 關鍵字在表中存在至少乙個匹配時返回行。

sql inner join 語法

select column_name(s)

from table1
inner join table2
on table1.column_name=table2.column_name;

select column_name(s)

from table1
join table2
on table1.column_name=table2.column_name;

select customers.customername, orders.orderid

from customers
inner join orders
on customers.customerid=orders.customerid
order by customers.customername;

select customers.customername, orders.orderid

from customers , orders
where customers.customerid=orders.customerid
order by customers.customername;

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