SQL游标的使用与语法 –打开游标 fetch next from my_cursor into @name,@number –将游标向下移1行,获取的数据放入之前定义的变量@id,@name中 while(@@fetch_status...=0) –判断是否成功获取数据 begin –update [spt_values] set [name]=@name+’1′ –where [
This example uses @@FETCH_STATUS to control cursor activities in a WHILE loop. SQL Másolás DECLARE Employee_Cursor CURSOR FOR SELECT BusinessEntityID, JobTitle FROM AdventureWorks2022.HumanResources.Employee; OPEN Employee_Cursor; FETCH NEXT FROM Employee_Cursor; WHILE @@FETCH_STATUS = 0 BEGIN...
@FirstName -- Check @@FETCH_STATUS to see if there are any more rows to fetch. WHILE @@FETCH_STATUS = 0 BEGIN -- Concatenate and display the current values in the variables. PRINT 'Contact Name: ' + @FirstName + ' ' + @LastName -- This is executed as long as the previous fetc...
WHILE @@FETCH_STATUS = 0 BEGIN -- Concatenate and display the current values in the variables. PRINT 'Contact Name: ' + @FirstName + ' ' + @LastName -- This is executed as long as the previous fetch succeeds. FETCH NEXT FROM contact_cursor INTO @LastName, @FirstName; END CLOSE...
DECLAREorder_cursorCURSORFORSELECTorder_id,customer_id,total_amountFROMordersWHEREorder_dateBETWEEN'2023-01-01'AND'2023-12-31';OPENorder_cursor;FETCHNEXTFROMorder_cursorINTO@order_id,@customer_id,@total_amount;WHILE@@FETCH_STATUS=0BEGIN-- 对单条订单数据进行处理PRINT'Processing order ID: '+CAST(...
-- Check @@FETCH_STATUS to see if there are any more rows to fetch.WHILE @@FETCH_STATUS = 0BEGIN-- Concatenate and display the current values in the variables.PRINT'Contact Name: '+ @FirstName +' '+ @LastName-- This is executed as long as the previous fetch succeeds.FETCHNEXTFROM...
This example uses@@FETCH_STATUSto control cursor activities in aWHILEloop. SQL DECLAREEmployee_CursorCURSORFORSELECTBusinessEntityID, JobTitleFROMAdventureWorks2022.HumanResources.Employee; OPEN Employee_Cursor; FETCH NEXT FROM Employee_Cursor; WHILE @@FETCH_STATUS = 0BEGINFETCHNEXTFROMEmployee_Cursor;END...
This example uses @@FETCH_STATUS to control cursor activities in a WHILE loop. SQL Copy DECLARE Employee_Cursor CURSOR FOR SELECT BusinessEntityID, JobTitle FROM AdventureWorks2022.HumanResources.Employee; OPEN Employee_Cursor; FETCH NEXT FROM Employee_Cursor; WHILE @@FETCH_STATUS = 0 BEGIN FETCH...
@@FETCH_STATUS 函数报告上一个 FETCH 语句的状态。相同的信息记录在由 sp_describe_cursor 返回的游标中的 fetch_status 列中。这些状态信息应该用于在对由 FETCH 语句返回的数据进行任何操作之前,以确定这些数据的有效性。有关详细信息,请参阅@@FETCH_STATUS (Transact-SQL)。
最近在做一个项目,前端菜单路径如下: { path: '/oa/workflow/process/:status', component:...经查,是因为各个菜单路由是相同的,vue就会认为你是同一个页面,从而复用已加载的页面,而不会重新加载...解决办法如下: watch: { '$route' (to, from) { //重新加载页面 this.switch...to.params['status']...