Oracle中Cursor, A表a1字段值复制到B表b1字段

 

不同表，字段赋值：

table_a 和table_b 两个表的code相关联， 把talbe_bd.name 属性值复制到table_a.name，

declare 
cursor css1 is
select id,code from table_a;
cursor css2 is
select id,code,name from table_b;
begin
  for cs1 in css1
    loop
      for cs2 in css2
        loop
          if cs1.code = cs2.code and cs1.id = cs2.id
            update table_a a set a.name = cs2.name where a.code = cs2.code;
          end if;
       end loop;
   end loop;
   commit;
end;

 

相同表字段赋值：

table_a表， 把code1的字段值复制到code2字段里面

declare 
cursor css1 is
select id from table_a;
cursor css2 is
select id,code1 from table_a;
begin
  for cs1 in css1
    loop
      for cs2 in css2
        loop
          if cs1.id = cs2.id
            update table_a a set a.code2 = cs2.code1 where a.id = cs2.id;
          end if;
       end loop;
   end loop;
   commit;
end;

 

 

更多参考：oracle-cursor