的MySQL凡，極限輸出

Question

所以我有這樣

SELECT * FROM table WHERE id IN (1,2,3) LIMIT 10 

查詢是否有可能限制輸出的數量每個數組元素像

SELECT * FROM table WHERE id 1 LIMIT 10 
SELECT * FROM table WHERE id 2 LIMIT 10 
SELECT * FROM table WHERE id 3 LIMIT 10 

Answer 1

是的，你可以做它使用變量：

SELECT * 
FROM (
    SELECT *, 
     @seq := IF(id = @id, @seq + 1, 
        IF(@id := id, 1, 1)) AS seq 
    FROM table 
    CROSS JOIN (SELECT @seq := 0, @id := 0) AS vars 
    WHERE id IN (1,2,3) 
    ORDER BY id) AS t 
WHERE t.seq <= 10 

Answer 2

如果你害怕的MySQL變量（我），你也可以使用一個UNION曲ery：

(SELECT * FROM table WHERE id = 1 LIMIT 10) 
UNION ALL 
(SELECT * FROM table WHERE id = 2 LIMIT 10) 
UNION ALL 
(SELECT * FROM table WHERE id = 3 LIMIT 10)