oracle多表怎么拼接查询 oracle多表内连接

oracle多表查询问题。

这个地方可能不能用likeoracle多表怎么拼接查询，因为oracle会把a.t_id当成oracle多表怎么拼接查询你要匹配oracle多表怎么拼接查询的对象oracle多表怎么拼接查询，而type表里oracle多表怎么拼接查询的id又没有a.t_id这样的值，所以查不到结果。

oracle从两个不同表中查询的结果 怎么合并

SELECT

(select count(*) from table1 ) AS COUNT_1 ,

(select count(*) from table2 ) AS COUNT_2

FROM DUAL

或者

SELECT X.COUNT_1,Y.COUNT_2

FROM

( select count(*) AS COUNT_1 from table1 ) X,

(select count(*) AS COUNT_2 from table2 ) Y

关于oracle多表联合查询的语句如何写？

我给你写一个，保证能用，验证能用的话请采纳！！！

select all_.bh,all_.name,a.sl,b.sl1,c.sl2,c.sl3 from

(

select bh,name from a

union

select bh,name from b

union

select bh,name from c

) all_

left outer join a on all_.bh = a.bh and all_.name = a.name

left outer join b on all_.bh = b.bh and all_.name = b.name

left outer join c on all_.bh = c.bh and all_.name = c.name

跪求！！！oracle数据库 多表连接查询 小弟跪谢！！

select sum(b.coll) from a,b,c,d

where a.collno=b.collno

and b.collno=c.collno

and b.cloono=d.collno

and to_char(d.stationtime,'yyyymmdd') between '20130101' and '20131231'

and onstation=1

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