Oracle表操作 （未完待续）

1. Oracle 中将一个表中数据导入到另外一个表的方法

insert into  scd_data_201007 select * from analog_data_201007 ;

2. 纵表转换为横表

纵表格式

pid                   dtag  　　ttag  　　dqf    　　pval

1001-1-1001    100    　　1       　　0    　　10.10

横表格式：

pid    h1  h2  h3

Select --Pid,Substr(Pid, 8, 4) As Dev_Type,
 Substr(Pid, 0, 6) As Dev_Type,
 To_Char(To_Date('', 'yyyymmdd') + Dtag, 'YYYY-MM-DD') || ' ' ||
  Trunc(Ttag / 60) || ':00:00' As Datetime,
 -- Dtag, Ttag,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy1,

 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy2,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy3,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy4,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy5,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy6,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy7,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy8,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As C2h2,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As C2h6,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy11,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy12,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy13,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy14,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy15,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy16,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy17,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy18,
 Sum(Case Substr(Pid, 8, 4)
              When '' Then
               Pval
              Else
               0
      End) As Cy19

From Analog_Data_200701
--Where Dtag = '2558' And Ttag = '240' And Substr(Pid, 0, 6) = '1001-4'
Group By Substr(Pid, 0, 6), Dtag, Ttag --, Pval
Order By Dtag, Ttag, Substr(Pid, 0, 6)

3. Oracle 从已知表同步数据

merge into sm_classes sc
using (select * from ceibs_uv_embaclass) c
on(sc.id = c.id)
when matched then update
set sc.classname=c.classname,sc.groupname=c.group_name
when not matched then
insert (sc.id,sc.classname,sc.groupname)values (c.id,c.classname,c.group_name)

参考文章

Oracle 中将一个表中数据导入到另外一个表的方法

纵表转换为横表

Oracle 从已知表同步数据