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基于游标的定位DELETE/UPDATE语句

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Release: 2016-06-07 17:37:19
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如果游标是可更新的(也就是说,在定义游标语句中不包括Read Only 参数),就可以用游标从游标数据的源表中DELETE/UPDATE行,即DELETE/UPDATE基于游标指针的当前位置的操作; 举例: --删除当前行的记录 Declare cur_Depart Cursor For Select cDeptID,cDeptN

如果游标是可更新的(也就是说,在定义游标语句中不包括Read Only 参数),就可以用游标从游标数据的源表中DELETE/UPDATE行,,即DELETE/UPDATE基于游标指针的当前位置的操作;
举例:

--删除当前行的记录
Declare cur_Depart Cursor
For Select cDeptID,cDeptName From Department into @DeptID,@DeptName
Open cur_Depart
Fetch From cur_Depart into @DeptID,@DeptName
Delete From Department Where CURRENT OF cur_Depart
--更新当前行的内容
Declare cur_Depart Cursor
For Select cDeptID,cDeptName From Department into @DeptID,@DeptName
Open cur_Depart
Fetch From cur_Depart into @DeptID,@DeptName
Update Department Set cDeptID='2007' + @DeptID Where CURRENT OF cur_Depart

 

一个Update例子

create table t1 ( id int ) () t1 ,c_update_id id from t1 c_update_id c_update_id () c_update_id c_update_id c_update_id DEALLOCATE c_update_id t1 t1

 

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