[英]Error #1241 - Operand should contain 1 column(s)
I am trying this QUERY, and return this weird error.我正在尝试这个 QUERY,并返回这个奇怪的错误。 What does it mean?这是什么意思?
Here is my query:这是我的查询:
SELECT * FROM newRowP a WHERE a.rowId IN
(SELECT * FROM newCellP b WHERE b.cellId IN
(SELECT * FROM newproviderP c WHERE c.pId IN ('3000344','245')))
Your subqueries, which SELECT *
, are returning more than one column;您的SELECT *
子查询返回不止一列; whereas IN ()
requires exactly one column to be returned.而IN ()
需要返回一列。
There should only be one column returned from the result of a SELECT
statement in a subquery.子查询中的SELECT
语句的结果应该只返回一列。 eg例如
SELECT *
FROM newRowP a
WHERE a.rowId IN (SELECT colName FROM newCellP b .....)
but a better way of using IN
is JOIN
ing the tables.但使用IN
的更好方法是JOIN
表。
SELECT DISTINCT a.*
FROM newRowP a
INNER JOIN newCellP b
ON a.rowID = b.colName
INNER JOIN newProviderP c
ON b.cellID = c. colName
WHERE c.pid IN ('3000344','245')
where colname
are the columns that you want to link with other table.其中colname
是要与其他表链接的列。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.