需要mySQL查询帮助

Question

我有两张桌子：

t1
------------------
inv_ID
inv_memID
inv_projID

t2
------------------
is_ID
is_msgID
is_contID

我需要将所有 t2.is_contID 放入数组

• inv_projID = 5
• t2.is_msgID = t1.inv_ID和
• t1.inv_memID = 1

看起来非常直接，但我被卡住了......试过这个：

SELECT t2.is_contID 
INNER JOIN t1 ON (t1.inv_ID = t2.is_msgID)
FROM t2
WHERE t1.inv_projID = 5
AND t1.inv_memID = 1 

我错过了什么？

Answer 1

FROM出现在JOIN之前。

SELECT t2.is_contID 
FROM t2
INNER JOIN t1 ON (t1.inv_ID = t2.is_msgID)
WHERE t1.inv_projID = 5
AND t1.inv_memID = 1 

SQL对关键字的顺序非常挑剔 正确的顺序是：

SELECT
FROM
JOIN
WHERE
HAVING
GROUP BY
ORDER
LIMIT    <<-- MySQL only, other DB's user other keywords in other places.