我开始学习SQL,但我遇到了一些问题.
我有一个包含4个表的数据库.
所有4个表都有列ID.
像这样的东西:
Table name................Column #1..................Column #2
Table1.................... ID......................Data1..
Table2......................ID......................Data2..
Table3......................ID......................Data3..
Table4......................ID......................Data4..
我按ID选择.
SELECT Data1, Data2, Data3, Data4 FROM TABLE1
INNER JOIN TABLE2 ON TABLE1.ID = TABLE2.ID
INNER JOIN TABLE3 ON TABLE1.ID = TABLE3.ID
INNER JOIN TABLE4 ON TABLE1.ID = TABLE4.ID
WHERE TABLE.ID=' X '
如何通过ID删除和更新此4个表中的列？有人能帮助我吗？我是初学者.
sql ×1