MySql的插入的選擇

Question

的結果，我想知道我是否可以運行這樣的請求：

INSERT INTO t2 (a, b) 
VALUES (
SELECT a, b 
FROM `t1` AS o 
WHERE o.id NOT 
IN (
    SELECT a 
    FROM t2 
) 
) 

的想法是，以填補從T1一些數據T2，但我一定是錯的在語法上。

感謝您的幫助

Answer 1

從SELECT語句插入，當你不使用VALUES關鍵字。

INSERT INTO t2 (a, b) 
SELECT a, b 
FROM `t1` AS o 
WHERE o.id NOT 
IN (
    SELECT a 
    FROM t2 
) 

Answer 2

刪除values

像

INSERT INTO t2 (a, b) 
SELECT a, b 
FROM `t1` AS o 
WHERE o.id NOT 
IN 
(
    SELECT a 
    FROM t2 
); 

或更readble格式

INSERT INTO t2 (a, b) 
SELECT o.a, o.b 
FROM `t1` AS o 
LEFT JOIN t2 ON o.id=t2.a 
WHERE t2.a IS NULL; 

Answer 3

你不需要在查詢中值。