标签:style blog color ar os 使用 for sp 数据
CREATE TABLE #xms_staff_department ( id int, name varchar(128), parent_id int, parent_path varchar(512) , depth smallint, is_delete tinyint, sort smallint ) INSERT INTO #xms_staff_department SELECT id,name,0,‘0,‘+CONVERT(VARCHAR,id),1, (CASE WHEN IsVaild = 1 THEN 0 ELSE 1 END), dOrder FROM dept WHERE Pid = 0 DECLARE @id INT DECLARE @parent_path VARCHAR(128) DECLARE @cursor1 CURSOR SET @cursor1 = CURSOR FORWARD_ONLY STATIC FOR SELECT id, parent_path FROM #xms_staff_department OPEN @cursor1 FETCH NEXT FROM @cursor1 INTO @id, @parent_path WHILE (@@FETCH_STATUS = 0) BEGIN INSERT INTO #xms_staff_department SELECT id,name,Pid, @parent_path+‘,‘+CONVERT(VARCHAR,id),2, (CASE WHEN IsVaild = 1 THEN 0 ELSE 1 END), dOrder FROM dept WHERE Pid = @id DECLARE @cursor2 CURSOR DECLARE @id2 INT DECLARE @parent_path2 VARCHAR(128) SET @cursor2 = CURSOR FORWARD_ONLY STATIC FOR SELECT id, parent_path FROM #xms_staff_department WHERE parent_id = @id OPEN @cursor2 FETCH NEXT FROM @cursor2 INTO @id2, @parent_path2 WHILE (@@FETCH_STATUS = 0) BEGIN INSERT INTO #xms_staff_department SELECT id,name,Pid, @parent_path+‘,‘+CONVERT(VARCHAR,id),3, (CASE WHEN IsVaild = 1 THEN 0 ELSE 1 END), dOrder FROM dept WHERE Pid = @id2 DECLARE @cursor3 CURSOR DECLARE @id3 INT DECLARE @parent_path3 VARCHAR(128) SET @cursor3 = CURSOR FORWARD_ONLY STATIC FOR SELECT id, parent_path FROM #xms_staff_department WHERE parent_id = @id2 OPEN @cursor3 FETCH NEXT FROM @cursor3 INTO @id3, @parent_path3 WHILE (@@FETCH_STATUS = 0) BEGIN INSERT INTO #xms_staff_department SELECT id,name,Pid, @parent_path+‘,‘+CONVERT(VARCHAR,id),4, (CASE WHEN IsVaild = 1 THEN 0 ELSE 1 END), dOrder FROM dept WHERE Pid = @id3 DECLARE @cursor4 CURSOR DECLARE @id4 INT DECLARE @parent_path4 VARCHAR(128) SET @cursor4 = CURSOR FORWARD_ONLY STATIC FOR SELECT id, parent_path FROM #xms_staff_department WHERE parent_id = @id3 OPEN @cursor4 FETCH NEXT FROM @cursor4 INTO @id4, @parent_path4 WHILE (@@FETCH_STATUS = 0) BEGIN INSERT INTO #xms_staff_department SELECT id,name,Pid, @parent_path+‘,‘+CONVERT(VARCHAR,id),5, (CASE WHEN IsVaild = 1 THEN 0 ELSE 1 END), dOrder FROM dept WHERE Pid = @id4 FETCH NEXT FROM @cursor4 INTO @id4, @parent_path4 END CLOSE @cursor4 DEALLOCATE @cursor4 FETCH NEXT FROM @cursor3 INTO @id3, @parent_path3 END CLOSE @cursor3 DEALLOCATE @cursor3 FETCH NEXT FROM @cursor2 INTO @id2, @parent_path2 END CLOSE @cursor2 DEALLOCATE @cursor2 FETCH NEXT FROM @cursor1 INTO @id, @parent_path END CLOSE @cursor1 DEALLOCATE @cursor1 select * from #xms_staff_department
drop table #xms_staff_department
上述是个简单的sql游标的使用方法,写法很水,但需要注意的是
SET @cursor = CURSOR FORWARD_ONLY STATIC FOR "标注红色的使用"
备注: SQL游标的执行效率之静态游标的高效率执行
STATIC静态游标创建将由该游标使用的数据的临时复本,对游标的所有请求都从tempdb 中的这一临时表中得到应答,因此在对该游标进行提取操作时返回的数据中不反映对基表所做的修改,并且该游标不允许修改
FORWARD_ONLY 指定数据只能从第一条到最后一条
sql2008游标FORWARD_ONLY STATIC 的使用方式
标签:style blog color ar os 使用 for sp 数据
原文地址:http://www.cnblogs.com/lovekingly/p/4073104.html