在新的 table 中将多个 table 合并为一行

Question

UPDATE the_main_table
SET item_Name = (
SELECT item_Name
FROM 1d_high_today
WHERE 1d_high_today.osrs_id = the_main_table.osrs_id
);

UPDATE the_main_table
SET D_high = (
SELECT D_high
FROM 1d_high_today
WHERE 1d_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET D_low = (
SELECT D_low
FROM 1d_high_today
WHERE 1d_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET D_low_volume = (
SELECT D_low_volume
FROM 1d_high_today
WHERE 1d_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET D_high_volume = (
SELECT D_high_volume
FROM 1d_high_today
WHERE 1d_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET D_Margin = (
SELECT D_Margin
FROM 1d_high_today
WHERE 1d_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET D_Volume = (
SELECT D_Volume
FROM 1d_high_today
WHERE 1d_high_today.osrs_id = the_main_table.osrs_id
);

UPDATE the_main_table
SET item_Name = (
SELECT item_Name
FROM 1h_high_today
WHERE 1h_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET H_high = (
SELECT H_high
FROM 1h_high_today
WHERE 1h_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET H_low = (
SELECT H_low
FROM 1h_high_today
WHERE 1h_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET H_low_volume = (
SELECT H_low_volume
FROM 1h_high_today
WHERE 1h_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET H_high_volume = (
SELECT H_high_volume
FROM 1h_high_today
WHERE 1h_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET H_Margin = (
SELECT H_Margin
FROM 1h_high_today
WHERE 1h_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET H_Volume = (
SELECT H_Volume
FROM 1h_high_today
WHERE 1h_high_today.osrs_id = the_main_table.osrs_id
);






UPDATE the_main_table
SET item_Name = (
SELECT item_Name
FROM latest_high_today
WHERE latest_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET l_high = (
SELECT l_high
FROM latest_high_today
WHERE latest_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET l_low = (
SELECT l_low
FROM latest_high_today
WHERE latest_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET L_low_Time = (
SELECT L_low_Time
FROM latest_high_today
WHERE latest_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET L_high_Time = (
SELECT L_high_Time
FROM latest_high_today
WHERE latest_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET L_Margin = (
SELECT L_Margin
FROM latest_high_today
WHERE latest_high_today.osrs_id = the_main_table.osrs_id
);





UPDATE the_main_table
SET item_Name = (
SELECT item_Name
FROM 30m_high_today
WHERE 30m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET T_high = (
SELECT T_high
FROM 30m_high_today
WHERE 30m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET T_low = (
SELECT T_low
FROM 30m_high_today
WHERE 30m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET T_low_volume = (
SELECT T_low_volume
FROM 30m_high_today
WHERE 30m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET T_high_volume = (
SELECT T_high_volume
FROM 30m_high_today
WHERE 30m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET T_Margin = (
SELECT T_Margin
FROM 30m_high_today
WHERE 30m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET T_Volume = (
SELECT T_Volume
FROM 30m_high_today
WHERE 30m_high_today.osrs_id = the_main_table.osrs_id
);


UPDATE the_main_table
SET item_Name = (
SELECT item_Name
FROM 5m_high_today
WHERE 5m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET F_high = (
SELECT F_high
FROM 5m_high_today
WHERE 5m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET F_low = (
SELECT F_low
FROM 5m_high_today
WHERE 5m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET F_low_volume = (
SELECT F_low_volume
FROM 5m_high_today
WHERE 5m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET F_high_volume = (
SELECT F_high_volume
FROM 5m_high_today
WHERE 5m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET F_Margin = (
SELECT F_Margin
FROM 5m_high_today
WHERE 5m_high_today.osrs_id = the_main_table.osrs_id
);
UPDATE the_main_table
SET F_Volume = (
SELECT F_Volume
FROM 5m_high_today
WHERE 5m_high_today.osrs_id = the_main_table.osrs_id
);

我有这个庞大的 SQL 查询。

这确实预制了我要完成的任务“将多个 table 列合并到新的 table 中，在 1 行内”

但是只有几千行数据，速度很慢

有没有一种方法可以缩短此查询并仍然完成同样的事情？

我尝试过 JOIN 和 union 之类的方法，但无法使它们正常运行。

进行这个非常长的查询是唯一有效的解决方案。

Answer 1

我不会仔细研究您的所有代码。但是从前几个例子可以清楚地看出，你可以使用join。例如：

UPDATE the_main_table m JOIN
       1d_high_today ht
       ON ht.osrs_id = m.osrs_id
    SET m.item_Name = ht.item_Name
        m.D_high = ht.D_high,
        m.D_low =  ht.D_low,
        . . .;

为此，您需要 1d_high_today(osrs_id) 上的索引。

在新的 table 中将多个 table 合并为一行

Merge multiple tables into one row in a new table

mysql

sql

database

database-design