如何使用动态查询插入表变量？

Question

我尝试使用临时表来开发这个存储过程但是这不起作用所以我切换到使用表变量.我需要对表变量执行临时动态查询,然后使用该表变量来执行最终查询.问题是我收到错误"必须声明标量变量@clms".我假设Exec没有表变量的范围？

DECLARE @qry nvarchar(4000)
DECLARE @clms TABLE (mastcatname nvarchar(50),engdtlbeta decimal (18,4))
SET @qry='INSERT INTO @clms 
          SELECT distinct replace(mastcatname, '' '', '''') as mastcatname, 
                 engdtlbeta 
          FROM vw_Scorecard 
          WHERE empsurveyid=' + cAST(@EmpSurveyID AS nvarchar(10)) + ' 
               AND UnitID IN (' + @UnitIDs + ') 
          ORDER BY engdtlbeta desc, MastCatName'

EXEC(@qry)

DECLARE @cols nvarchar(1000)
SELECT @cols=COALESCE (@cols + ',[' + mastcatname + ']', '[' + mastcatname + ']') 
FROM @clms


SET @qry='SELECT UnitName ,
                 ParentName, ' + @cols + ' 
          FROM (
                SELECT UnitName,
                    ParentName, 
                    ScoreAvg, 
                    replace(mastcatname, '' '','''') as mastcatname 
                FROM vw_Scorecard 
                WHERE UnitID IN (' + @UnitIDs + ') 
                    AND EmpSurveyID=' + cast(@EmpSurveyID as nvarchar(5)) + ' ) p
          PIVOT
            (SUM(ScoreAvg) FOR mastcatname in (' + @cols + ')) as pvt'

EXEC (@qry)

Answer 1

这是一个简单的最小例子.你可以使用INSERT EXEC声明.关键是在动态查询的内部和外部声明表变量.在动态查询结束时,只需从表变量中选择并将结果集插入到外部表变量中:

DECLARE @t TABLE ( id INT ) 

DECLARE @q NVARCHAR(MAX) = 'declare @t table(id int) 
                            insert into @t values(1),(2) 
                            select * from @t'

INSERT INTO @t
EXEC(@q)

SELECT * FROM @t