mysql query optimizaiton

Question

可否请您优化下面的mysql查询。

SELECT COUNT(DISTINCT a.cust_id) as total FROM all_ids AS a LEFT JOIN id_details AS b ON a.cust_id = b.cust_id, users p WHERE (a.status = 'A' or a.status = 'I') and b.cust_id IS NOT NULL and a.type = 'abc' AND a.user_id = p.id AND p.team = 'customers'; 

Answer 1

1. 您可能需要添加GROUP BY a.useri_id
2. 与a.status更换（a.status = 'A' 或a.status = 'I'）IN（ 'A'， 'I'）
3. 至于加速它，你需要添加索引到以下列：a.status，a.type，p.team
4. 也考虑将以下列从字符串更改为整数，可能会使用外部查询表：a.status，a.type，p.team