mysql - 在 mysql 中创建一个 Where 子句

Question

find_by_sql("SELECT s.productcode, s.description, CAST(SUM(l.amount) as UNSIGNED) AS amount FROM softwares s LEFT JOIN licenses l ON s.id=l.software_id GROUP BY s.productcode, s.description WHERE s.supplier= 'softcat'")

我目前有这个，我在 SoftwaresController#export_softcat 中收到错误 ActiveRecord::StatementInvalid

我试图在末尾添加一个 where 子句以仅选择特定供应商的记录。

Answer 1

SELECT s.productcode, s.description, CAST(SUM(l.amount) as UNSIGNED) AS amount
FROM softwares s
    LEFT JOIN licenses l ON s.id=l.software_id
WHERE s.supplier = 'softcat'
GROUP BY s.productcode, s.description

这样试试