兩個(gè)不同的表進(jìn)行查詢，需要把結(jié)果合并，
比如table1的列為 id, user_id, type_id,pro_id；
table2的列為 id,user_id,collect_id；分別如下圖所示
table1：
table2：
將兩個(gè)表的查詢結(jié)果合并到一起的查詢語句為
select *, null as collect_id from table1 where user_id = 527
union
select id,user_id,null as type_id,null as pro_id, collect_id from table2 where user_id = 527;
結(jié)果為：
其實(shí)就是把對(duì)應(yīng)的列補(bǔ)充到?jīng)]有該列的表中，在例子中就是把collect_id補(bǔ)充到table1中,
把type_id,pro_id補(bǔ)充到table2中。
補(bǔ)充知識(shí)：sql結(jié)果集合并用union all 不同表的列合并用join
結(jié)果集合并用union all 不同表的列合并用join
SELECT
"模塊名",
"事件編碼",
"點(diǎn)擊數(shù)量",
"使用時(shí)長(zhǎng)（單位：分）"
FROM
(SELECT
T.fun_name as "模塊名",
T.event_code as "事件編碼",
SUM(click_records) as "點(diǎn)擊數(shù)量"
FROM
(SELECT m.* FROM default.daily_new_clientrpt_master m WHERE event_id in ( SELECT max(event_id) AS "事件" from default.daily_new_clientrpt_master group by user_name,fun_code ORDER BY "事件" DESC ) ) T where day = today() GROUP BY "模塊名" ,"事件編碼") T5
JOIN
(
SELECT
T.fun_name as "模塊名",
T.event_code as "事件編碼",
round(sum(stay_time)/60000,0) as "使用時(shí)長(zhǎng)（單位：分）"
FROM
(SELECT m.* FROM default.daily_new_clientrpt_master m WHERE event_id in
(
SELECT "事件" FROM (
SELECT max(event_id) AS "事件", max(stay_time) AS "事件1" from default.daily_new_clientrpt_master group by user_name,fun_code ORDER BY "事件1" DESC) )
)
T where day = today() AND like(event_code,'%10000') GROUP BY "模塊名" ,"事件編碼"
) T6 ON T5."模塊名"=T6."模塊名" AND T5."事件編碼"=T6."事件編碼"
以上這篇SQL 列不同的表查詢結(jié)果合并操作就是小編分享給大家的全部?jī)?nèi)容了，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。
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