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create or replace view V_WTK_ALL as

  select a.id, o.short as FindDeptName, u.realname as FindUserName, f.name as FindWay, o1.short as ProblemAtDeptName,

  z.name as szzz, a.yhnr, s.name as SSZY, k.name as kind, w.name as whhg, a.zgcs, a.zgfzr, a.plandate, a.finishdate,

  u1.realname as jdr, u2.realname as fxr, a.yqzt, a.yqdate, a.wtkzt

  from WTK a, ORGANIZATION o, ORGANIZATION o1, OPERATORS u,OPERATORS u1,OPERATORS u2, Kind k, Findway f, SPfield s, SZZZ z, WHHG w

  where a.finddeptid =o.id(+) and a.problematdeptid=o1.id(+) and a.finduserid=u.id(+) and a.jdr=u1.id(+) and a.fxr=u2.id(+)

  and a.kindid=k.id(+) and a.findwayid=f.id(+) and a.spfieldid=s.id(+) and a.szzid =z.id(+) and a.whhgid=w.id(+)

  有两个表

  table1

  user_id     user_name     user_ps教程s

   1             aaa            a

   2             bbb            b

   3          ccc            c

  table2

  user_id     user_power

   1            111000

   2            000111

  使用sql语句查询

  正常状态:

  select table1.user_id,

  table1.user_name,

  table2.user_power

  from table1,table2

  where table1.user_id = table2.user_id

  但是这样检索到的数据只有两条:

  user_id     user_name      user_power

  1           aaa            000111

  2           bbb            111000

  输入你想转换的文字内容,

  点击下面按钮进行在线转换。

  select table1.user_id,table1.user_name,table2.user_power

  from table1,table2

  where table1.user_id (+)= table2.user_id

  就可以得到如下的结果

  user_id     user_name      user_power

  1             aaa             000111

  2             bbb             111000

  3             ccc             (null) 

本文来源:http://www.gdgbn.com/jiaocheng/24290/