收到错误：子查询返回多个值

Question

下面是执行这个查询我收到提示

Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

Answer 1

我没有看到代码我的SQL查询

BEGIN TRAN 

DECLARE @PRE_CD INT = (SELECT ISNULL(MAX(PRE_CD), 0) FROM TBL_MAIN) 

INSERT INTO TBL_MAIN 
      (PRE_CD, 
      PRE_DESC, 
      PRE_REF_CD) 
SELECT ROW_NUMBER() OVER (ORDER BY PRESENTATION) + @PRE_CD, 
     PRESENTATION, 
     3 
FROM (SELECT DISTINCT PRESENTATION 
     FROM Temp_Data 
     WHERE PRESENTATION NOT IN (SELECT PRE_DESC 
            FROM TBL_MAIN)) T 

COMMIT; 

直接导致它。

也许你有一个错误INSERT触发器的表，假设INSERTED将只包含一个单行，并失败的多行插入。