对于系统进程,将存储Sql Server 的启动时间 10.Open_tran:进程的打开事务个数。如果有嵌套事务,就会大于1 11.Status:进程ID 状态,dormant = 正在重置回话 ; running = 回话正在运行一个或多个批处理 ; background = 回话正在运行一个后台任务 ; rollback = 会话正在处理事务回滚 ; pending = 回话正在等待工作...
WHILE @@FETCH_STATUS = 0BEGINIF(@log_reuse_wait >0)BEGINSELECT'-- '+QUOTENAME(@dbname) +' database has log_reuse_wait = '+ @log_reuse_wait_desc +' --'AS'Individual Database Report';ENDIF(@log_reuse_wait =1)BEGINSELECT'Consider running the checkpoint command to a...
WHILE @@FETCH_STATUS = 0BEGINIF(@log_reuse_wait >0)BEGINSELECT'-- '+QUOTENAME(@dbname) +' database has log_reuse_wait = '+ @log_reuse_wait_desc +' --'AS'Individual Database Report';ENDIF(@log_reuse_wait =1)BEGINSELECT'Consider running the checkpoint command to attempt resolving thi...
<ccid_code>SET XACT_ABORT ONdeclare @r intset @r = 1while @r <= 3begin begin tran begin try insert into Orders(CustomerId) values(@#ALFKI@#) waitfor delay @#00:00:05@# select * from Orders where CustomerId = @#ALFKI@# commit break end try begin catch rollback waitfor delay @...
while @@FETCH_STATUS=0 --判断是否执行成功 begin print cast(@pno as varchar)+','+@pname+','+cast(@price as varchar) fetch next from @varCursor into @pno,@pname,@price--游标前进 into 赋值 end 1. 2. 3. 4. 5. 6. 7.
@@FETCH_STATUS会为-2,KEYSET无法探测新加入的数据 FAST_FORWARD可以理解成FORWARD_ONLY的优化版本.FORWARD_ONLY执行的是静态计划,而FAST_FORWARD是根据情况进行选择采用动态计划还是静态计划,大多数情况下FAST_FORWARD要比FORWARD_ONLY性能略好. READ_ONLY SCROLL_LOCKS OPTIMISTIC 三选一 ...
WHILE @@FETCH_STATUS = 0 BEGIN -- This is executed as long as the previous fetch succeeds. FETCH NEXT FROM contact_cursor; END CLOSE contact_cursor; DEALLOCATE contact_cursor; GO B. 利用 FETCH 將值儲存在變數中 下列範例類似於範例 A,不過,FETCH 陳述式的輸出是儲存在本機變數中,而不是直接...
WHILE @@FETCH_STATUS = 0 BEGIN --DO somthing; END CLOSE myCursor; DEALLOCATE myCursor; -- But @@FETCH_STATUS is global variable -- So if we use another Cursor within the loop, when inner loop is completed, @@FETCH_STATUS = -1, so the outer loop will also be closed. ...
若要检索特定游标的最后提取状态,请查询 sys.dm_exec_cursors 动态管理函数的 fetch_status 列。 示例 此示例使用@@FETCH_STATUS来控制WHILE循环中的游标活动。 SQL DECLAREEmployee_CursorCURSORFORSELECTBusinessEntityID, JobTitleFROMAdventureWorks2022.HumanResources.Employee; OPEN Employee_Cursor; FETCH NEXT FROM ...
DECLARE CUR CURSOR FOR SELECT 料号,单位 FROM 入库表 WHERE 单位 <>0 OPEN CURFETCH NEXT FROM CUR INTO @料号,@单位 WHILE @@FETCH_STATUS<>-1 BEGIN IF @单位=1 BEGIN SET @参数=(SELECT 单位1参数 FROM 料件表 WHERE 料号 =@料号) UPDATE 入库表 SET 数量=数量*@参数,损坏数量=损坏数量*@参数...