SQL INSERT INTO表（a，b，c）VALUES（：a，：b，：c，SELECT ...）

Question

所以我試圖在表中插入4個值。我從POST獲得3個值，另一個我想從另一個表中獲得。這是我如何考慮實施它，但它似乎並沒有工作。有什麼建議麼？

$query = "INSERT INTO topics (subject, data, uid, role) VALUES (:user, :pass, :uid, SELECT role FROM users WHERE uid=:uid) "; 

Answer 1

在SQL中，所有子查詢都需要用它們自己的括號包圍。所以，你可以通過解決您的查詢：

INSERT INTO topics (subject, data, uid, role) 
    VALUES (:user, :pass, :uid, (SELECT role FROM users WHERE uid = :uid)); 

就個人而言，我更喜歡INSERT . . . SELECT版本的SELECT：

INSERT INTO topics (subject, data, uid, role) 
    SELECT :user, :pass, :uid, u.role 
    FROM users u 
    WHERE uid = :uid;