Mysql 其中多列相加超过16

我正在尝试提取所有有工程师的记录，并且总得分为16分或更高

价值、质量、服务、友好、响应时间都在同一个表中

我正在尝试添加所有这些，并执行一个WHERE

这就是我到目前为止得到的

SELECT *,
value_money+quality_service+friendliness+response_time AS overall
FROM feedback
WHERE engineer LIKE '%Chris Gauden%'
AND
overall < 16
ORDER BY date DESC
LIMIT 0, 15

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不能在WHERE子句中使用别名。

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您必须使用全价值的资金+优质服务+友好性+响应时间组合。

您不能在WHERE子句中使用别名。 您必须使用全价值的资金+优质服务+友好性+响应时间组合。

别名不能用于WHERE。要么

SELECT *,
value_money+quality_service+friendliness+response_time AS overall
FROM feedback
WHERE engineer LIKE '%Chris Gauden%'
AND
value_money+quality_service+friendliness+response_time < 16
ORDER BY date DESC
LIMIT 0, 15

或

别名不能用于WHERE。要么

SELECT *,
value_money+quality_service+friendliness+response_time AS overall
FROM feedback
WHERE engineer LIKE '%Chris Gauden%'
AND
value_money+quality_service+friendliness+response_time < 16
ORDER BY date DESC
LIMIT 0, 15

或

---

不确定您使用的数据库是什么，但请尝试以下操作：

SELECT *,
value_money+quality_service+friendliness+response_time AS overall
FROM feedback
WHERE engineer LIKE '%Chris Gauden%'
AND
SUM(value_money+quality_service+friendliness+response_time) < 16
ORDER BY date DESC
LIMIT 0, 15

---

不确定您使用的数据库是什么，但请尝试以下操作：

SELECT *,
value_money+quality_service+friendliness+response_time AS overall
FROM feedback
WHERE engineer LIKE '%Chris Gauden%'
AND
SUM(value_money+quality_service+friendliness+response_time) < 16
ORDER BY date DESC
LIMIT 0, 15

---

因为total不是该表中的一列，所以不能在where子句中引用它

您可以这样做：

SELECT * FROM 
(
    SELECT *,
           value_money+quality_service+friendliness+response_time AS overall
    FROM feedback
    WHERE engineer LIKE '%Chris Gauden%'
) AS ComputedTable
WHERE
    overall < 16
ORDER BY date DESC
LIMIT 0, 15

---

因为total不是该表中的一列，所以不能在where子句中引用它

您可以这样做：

SELECT * FROM 
(
    SELECT *,
           value_money+quality_service+friendliness+response_time AS overall
    FROM feedback
    WHERE engineer LIKE '%Chris Gauden%'
) AS ComputedTable
WHERE
    overall < 16
ORDER BY date DESC
LIMIT 0, 15

---

您的服务器可能不支持该功能。如果是这样的话，我可以想出两个选择。子查询：

SELECT * FROM (
SELECT *, value_money+quality_service+friendliness+response_time AS overall
FROM feedback
WHERE engineer LIKE '%Chris Gauden%') AS t
WHERE overall < 16
ORDER BY date DESC
LIMIT 0, 15

或者重复这个等式：

SELECT *,
value_money+quality_service+friendliness+response_time AS overall
FROM feedback
WHERE engineer LIKE '%Chris Gauden%'
AND
value_money+quality_service+friendliness+response_time < 16
ORDER BY date DESC
LIMIT 0, 15

---

您的服务器可能不支持该功能。如果是这样的话，我可以想出两个选择。子查询：

SELECT * FROM (
SELECT *, value_money+quality_service+friendliness+response_time AS overall
FROM feedback
WHERE engineer LIKE '%Chris Gauden%') AS t
WHERE overall < 16
ORDER BY date DESC
LIMIT 0, 15

或者重复这个等式：

SELECT *,
value_money+quality_service+friendliness+response_time AS overall
FROM feedback
WHERE engineer LIKE '%Chris Gauden%'
AND
value_money+quality_service+friendliness+response_time < 16
ORDER BY date DESC
LIMIT 0, 15

---

最简单的解决方案是将条件移动到having子句：

---

这是一个MySQL扩展，在其他数据库中不起作用。

最简单的解决方案是将条件移动到having子句：

---

这是一个MySQL扩展，在其他数据库中不起作用。

谢谢大家的帮助。我已经解决了，谢谢大家的帮助。我已经解决了，谢谢，我用了第一个例子。