Rumah >pangkalan data >tutorial mysql >SQL多行字符串按条件合并_MySQL
USE [ARTEA.MES] GO /****** Object: UserDefinedFunction [dbo].[UnionPart] Script Date: 11/18/2015 15:39:34 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO -- ============================================= -- Author: <Author,,Name> -- Create date: <Create Date, ,> -- Description: <Description, ,> -- ============================================= ALTER FUNCTION [dbo].[UnionPart] ( -- Add the parameters for the function here @OrderNo varchar(30) ) RETURNS [nvarchar](4000) AS BEGIN -- Declare the return variable here DECLARE @ReturnValue [nvarchar](4000) SET @ReturnValue = '' -- Add the T-SQL statements to compute the return value here SELECT @ReturnValue=@ReturnValue + RTRIM(LTRIM(c.PartName)) + ',' FROM table1 c left join table2 d on d.OrderID=c.OrderID WHERE d.OrderNO = @OrderNo SET @ReturnValue = substring(@ReturnValue,1,len(@ReturnValue)-1) RETURN @ReturnValue END GO