我有两个表:A和B。
Table A .Birthday .Name .LastName
Table B .Date .Salary .Rent
我需要写一个问题,即每个出生在(Birthday=)的人的工资增加10%。 页: 1
我不知道如何将这些表格连接起来,并更新表B。
我有两个表:A和B。
Table A .Birthday .Name .LastName
Table B .Date .Salary .Rent
我需要写一个问题,即每个出生在(Birthday=)的人的工资增加10%。 页: 1
我不知道如何将这些表格连接起来,并更新表B。
由于它们没有一个共同的一栏,因此不可能加入这些表格。
如同几位著名用户先前提到的那样,NEED PK in Table A
and FK in Table B
,否则不可能加入。 但是,要实际更新一个更好的 que点是:
Update b set b.Salary = b.Salary*1.1 From TableB b Inner Join TableA a On b.Id = a.Id Where a.Birthday = 05/05/1977
我先要把这两个表格联系起来。 在您的表格中创造出一个“id”的领域,并将这个领域作为表格中的主要重点。 之后,在你B桌上也创建了一个“id”作为外国钥匙的领域。 之后,你将能够写一下问话。
$q="select a_id from A where birthday= 05/05/1977 "; $rs= mysql_query($q); if($rs && mysql_num_rows($rs)) { whlile($rd=mysql_fetch_object($rs)) { $q1="update B set salary=(salary*1.1) where aid=$rd->aid"; $rs=mysql_query($q1); } }
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