mysql的從複雜的結果

Question

選擇隨機行中我有一個選擇類似像這樣的：

SELECT TABLE_4.ID, TABLE_4.USERNAME, TABLE_4.PHOTO, 

SELECT(COUNT(SOMETHING) FROM TABLE_1 WHERE ..) AS NUM_ALL 
SELECT(COUNT(SOMETHING) FROM TABLE_1 WHERE ..) AS NUM_DONE 
SELECT(COUNT(SOMETHING) FROM TABLE_2 WHERE ..) AS NUM_LIKES 

SELECT(COUNT(SOMETHING) FROM TABLE_3 WHERE ..) AS FOLLOWING 
SELECT(COUNT(SOMETHING) FROM TABLE_3 WHERE ..) AS FOLLOWERS 

CASE WHEN... 

FROM TABLE_4 
LEFT JOIN... 
LEFT JOIN... 
LEFT JOIN... 

WHERE <condition> 

GROUP BY TABLE_4.ID LIMIT 1000; 

說，有5000個結果此查詢。我想隨機選擇第一個1000。我認爲rand（）對於這個複雜且漫長的查詢來說是不成問題的。

你能幫我一把嗎？

Answer 1

是的，你可以使用RAND。只需添加

... ORDER BY RAND() LIMIT 1000; 

您的查詢結束。無論查詢有多完整，RAND（）將在最終結果出現時應用（EXPLAIN結果的第一行）。