table1
ID
SUBJECT
CONTENT
table2
ID
SUBJECT
CONTENT
table3
ID
SUBJECT
CONTENT
... 5 more
我想对所有表MySQL的多功能表搜索
搜索SUBJECT
我怎样才能做到这一点?
table1
ID
SUBJECT
CONTENT
table2
ID
SUBJECT
CONTENT
table3
ID
SUBJECT
CONTENT
... 5 more
我想对所有表MySQL的多功能表搜索
搜索SUBJECT
我怎样才能做到这一点?
select * from table1 where subject like '%match%' union
select * from table2 where subject like '%match%' union
select * from table3 where subject like '%match%' union
select * from table4 where subject like '%match%' union
select * from table5 where subject like '%match%' union
select * from table6 where subject like '%match%' union
select * from table7 where subject like '%match%' union
select * from table8 where subject like '%match%'
CREATE VIEW multitable AS
SELECT * FROM table1
UNION SELECT * from table2
UNION SELECT * from table3;
SELECT subject FROM multitable ...
因为所有的表都具有相同的语法,你可以使用UNION
操作。
SELECT * FROM Table1
UNION Table2
UNION Table3
UNION Table4
UNION Table5
UNION Table6
UNION Table7
UNION Table8
WHERE SUBJECT="Subject"
为了简单起见,8个表格并没有太多要写出来。如果你有更多,我会推荐dynamic query。
这些表是否都是相同的结构?如果是这样,为什么他们不被标准化为一张桌子?如果不是,你打算如何组合结果?您是在进行全文搜索还是仅仅进行常规搜索? – mellamokb
与表格相同的结构但不同的内容。 – Awersione