Question

我有一个查询，每次用户打开他的个人资料页面时都会加载该查询。而且它真的很慢。加载页面需要20多秒。它有点简单的查询，但有很多行，所以不要害怕看它。：）

我会帮助改善我的查询。

SELECT 
    `h`.`login` AS `login`,
    SUM(IF(((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)),`h`.`pips`,NULL)) AS `total_pips`,
    COUNT(IF(((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)),`h`.`position_num`,NULL)) AS `total_trades`,
    (COUNT(IF(((`h`.`pl` > 0) AND ((`h`.`cmd` = 0) OR (`h`.`cmd` = 1))),`h`.`pl`,NULL)) / COUNT(IF(((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)),`h`.`position_num`,NULL))) AS `winning_trades_percent`,
    SUM(if(((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)),`h`.`gain`,NULL)) AS `total_gain`,
    (SELECT AVG(`wg`.`weekly_gain_all`) FROM `gt_view_weekly_gain` `wg` where (`wg`.`login` = `h`.`login`) group by `wg`.`login`) AS `weekly_gain`,
    AVG(IF(((`h`.`pips` > 0) AND ((`h`.`cmd` = 0) OR (`h`.`cmd` = 1))),`h`.`pips`,NULL)) AS `average_profit_pips`,
    AVG(IF(((`h`.`pips` <= 0) AND ((`h`.`cmd` = 0) OR (`h`.`cmd` = 1))),`h`.`pips`,NULL)) AS `average_lose_pips`,
    AVG(IF(((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)),`h`.`pips`,NULL)) AS `average_pips`,
    AVG(time_to_sec(IF(((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)),timediff(`h`.`close_time`,`h`.`open_time`),NULL))) AS `average_trade_time`,
    STD(IF(((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)),`h`.`pips`,NULL)) AS `volatility`,
    MAX(IF(((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)),`h`.`pips`,NULL)) AS `best_trade`,
    MIN(IF(((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)),`h`.`pips`,NULL)) AS `worst_trade`,
    (ceiling(((ceiling(to_days(now())) - ceiling(to_days(MIN(IF(((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)),`h`.`open_time`,NULL))))) / 7)) - 1) AS `running_weeks`,
    (SELECT `fn`.`followers_num_all` FROM `gt_view_followers_num` `fn` where ((`fn`.`guru_id` = `h`.`guru_or_guru_user_id`) AND (`h`.`is_guru_history` = 1))) AS `followers_num`,
    SUM(IF(((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)),`h`.`pl`,NULL)) AS `total_profit_loss`,
    SUM(IF(((`h`.`cmd` = 6) AND (`h`.`pl` > 0)),`h`.`pl`,NULL)) AS `deposits`,
    SUM(IF(((`h`.`cmd` = 6) AND (`h`.`pl` < 0)),`h`.`pl`,NULL)) AS `withdrawls`,
    COUNT(IF((((`h`.`cmd` = 0) OR (`h`.`cmd` = 1)) AND (`h`.`pl` > 0)),`h`.`position_num`,NULL)) AS `total_winning_trades_count`,
    ABS((AVG(IF(((`h`.`pips` > 0) AND ((`h`.`cmd` = 0) OR (`h`.`cmd` = 1))),`h`.`pips`,NULL)) / AVG(IF(((`h`.`pips` <= 0) AND ((`h`.`cmd` = 0) OR (`h`.`cmd` = 1))),`h`.`pips`,NULL)))) AS `average_profit_loss_ratio` 
FROM 
    `gt_history` `h` 
WHERE
    `h`.`is_closed` = 1
GROUP BY
    `h`.`login`

Answer 1

这个查询似乎计算了所有用户的值。如果您希望仅为一个用户显示此内容，那么在where子句中添加and (login='xxx')可能要快得多。

否则，正如Mihai所说，缓存可能是最好的方法。

Answer 2

而不是在每个列IF中使用“（h。cmd = 0）OR（h。cmd = 1）”，尝试在where子句中过滤它。它可能会有所改进，因为数据选择会减少。

改善查询运行时间（加载页面需要20秒以上）

2 个答案: