用就不说了，上搜索上查一下，本示例就简单一些代码。动态执行SQL语句输出值

      DECLARE @sqlsen         NVARCHAR(2000),
              @table          VARCHAR(30),
              @Ifexist        VARCHAR(20),
              @TelType        TINYINT,
              @CustomerTelMd5 VARCHAR(32),
              @ParmDefinition NVARCHAR(500);
      SET @table ='xueit.dbo.表' + RIGHT(@CustomerTel, 2)
      SET @sqlsen ='select @Ifexist =字段,@CID=字段1,@TelType=字段2
             from ' + @table + ' where 表 =''' + @CustomerTel + ''''
      SET @ParmDefinition = N'@Ifexist varchar(20) OUTPUT,@CD int OUTPUT,@TelType tinyint OUTPUT'
      EXEC sp_Executesql
        @sqlsen,
        @ParmDefinition,
        @Ifexist OUTPUT,
        @CustomerID OUTPUT,
        @TelType OUTPUT