Oracle中with關鍵字的使用

 open p_cr1 for
      with sqla as
       (select d.*,
               (select c.STATICMONTH
                  from ly_zg_jzfbtstatic c
                 where c.ID = d.STATIC_ID) as STATICMONTH
          from tablename1 d
         where d.STATIC_ID in
               (select r.ID
                  from ly_zg_jzfbtstatic r
                 where to_char(r.STATICMONTH, 'yyyy') = varYear)
           and d.DISTNAME = '合計'),
      sqlb as
       (select d.*,
               (select c.STATICMONTH
                  from ly_zg_lzzfbtstatic c
                 where c.ID = d.STATIC_ID) as STATICMONTH
          from tablename2 d
         where d.STATIC_ID in
               (select r.ID
                  from ly_zg_lzzfbtstatic r
                 where to_char(r.STATICMONTH, 'yyyy') = varYear)
           and d.DISTNAME = '合計'),
      sqlc as
       (select d.*,
               (select c.STATICMONTH
                  from ly_zg_lzfbtstatic c
                 where c.ID = d.STATIC_ID) as STATICMONTH
          from tablename3 d
         where d.STATIC_ID in
               (select r.ID
                  from ly_zg_lzfbtstatic r
                 where to_char(r.STATICMONTH, 'yyyy') = varYear)
           and d.DISTNAME = '合計'),
      sqld as
       (select a.STATICMONTH,
               (a.newscount + b.newscount + c.newscount) newscount,
               (a.SYCOUNT + b.SYCOUNT + c.SYCOUNT) SYCOUNT,
               (a.NEWGCOUNT + b.NEWGCOUNT + c.NEWGCOUNT) NEWGCOUNT,
               (a.GYCOUNT + b.GYCOUNT + c.GYCOUNT) GYCOUNT,
               (a.MSCCOUNT + b.MSCCOUNT + c.MSCCOUNT) MSCCOUNT,
               (a.MGZFCOUNT + b.MGZFCOUNT + c.MGZFCOUNT) MGZFCOUNT,
               (c.MSCCOUNT + c.MGZFCOUNT) lzfMSCCOUNT,
               (b.MSCCOUNT + b.MGZFCOUNT) lzzfMSCCOUNT,
               (a.MSCCOUNT + a.MGZFCOUNT) jzfMSCCOUNT,
               (a.newscount + b.newscount + c.newscount + a.NEWGCOUNT +
               b.NEWGCOUNT + c.NEWGCOUNT) sum1,
               (a.MSCCOUNT + b.MSCCOUNT + c.MSCCOUNT + a.MGZFCOUNT +
               b.MGZFCOUNT + c.MGZFCOUNT) sum2
        
          from sqla a, sqlb b, sqlc c
         where a.STATICMONTH = b.STATICMONTH
           and c.STATICMONTH = a.STATICMONTH)
           --1
      select (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/01/01') as JAN,
             (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/02/01') as FEB,
             (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/03/01') as MAR,
             (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/04/01') as APRIL,
             (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/05/01') as MAY,
             (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/06/01') as JUNE,
             (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/07/01') as JULY,
             (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/08/01') as AUJUST,
             (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/09/01') as SEPT,
             (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/10/01') as OCT,
             (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/11/01') as NOV,
             (select newscount
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/12/01') as DECE
        from dual
      union all
      --2
      select null as JAN,
             null as FEB,
             null as MAR,
             null as APRIL,
             null as MAY,
             null as JUNE,
             null as JULY,
             null as AUGUST,
             null as SEPT,
             null as OCT,
             null as NOV,
             null as DECE
        from dual
      union all
      --3
      select (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/01/01') as JAN,
             (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/02/01') as FEB,
             (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/03/01') as MAR,
             (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/04/01') as APRIL,
             (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/05/01') as MAY,
             (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/06/01') as JUNE,
             (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/07/01') as JULY,
             (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/08/01') as AUJUST,
             (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/09/01') as SEPT,
             (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/10/01') as OCT,
             (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/11/01') as NOV,
             (select SYCOUNT
                from sqld
               where to_char(STATICMONTH, 'yyyy/mm/dd') = varYear || '/12/01') as DECE
        from dual；

當現有的表不滿足我們寫如意sql，或者是根據現有的表寫出如意sql太過復雜，所以Oracle為我們提出了with關鍵字，幫我們提供了很大的幫助

住，with后面的虛擬表必須用圓括號包起來，並且括號后面必須緊連接select關鍵字

並且用union all 連接的行中，每行中的列數據類型必須一致，注:null兼容任意數據類型

ye。。。。。。