的单行显示多行的值我有这个疑问:如何输出
SELECT table_1.user_code AS user,
table_1.charge_code,
table_1.unit_code,
table_3.roles_code,
table_2.apps_code
FROM table_1
INNER JOIN table_3 ON
table_1.user_code = table_3.Cod_Usr
INNER JOIN table_2 ON
table_3.roles_code = table_2.roles_code
WHERE
table_1.fec_baja IS NULL
ORDER BY table_1.user_code ASC, table_3.roles_code, table_2.roles_code;
我通常用它来了解,用户根据自己的charge_code,unit_code和role_code
访问的applications_code而且,这是上面的查询结果:
user_code charge_code unit_code role_code apps_code
1 USER01 AAA001 111111111 BASICMENU APPS0001
2 USER01 AAA001 111111111 BASICMENU APPS0005
3 USER01 AAA001 111111111 BASICMENU APPS0008
4 USER01 AAA001 111111111 BASICMENU APPS1245
5 USER01 AAA001 111111111 LOGIN APPS0013
6 USER01 AAA001 111111111 LOGIN APPS1291
7 USER02 BBB0001 222222222 CASHIER001 APPS01SF
8 USER02 BBB0001 222222222 CASHIER001 APPS12RE
9 USER02 BBB0001 222222222 CASHIER001 APPS178E
8 USER02 BBB0001 222222222 CASHIER001 APPSZS45
9 USER02 BBB0001 222222222 CASHIER001 APPS12DF
10 USER02 BBB0001 222222222 CASHIER001 APPS1RE5
11 USER02 BBB0001 222222222 BASICMENU APPSTY45
12 USER02 BBB0001 222222222 BASICMENU APPS1KJ5
以前我是可以正常使用,但现在拿由于大量的记录,超过10分钟的运行时间。
我试图得到以下结果:
user_code charge_code unit_code role_code apps_code
1 USER01 AAA001 111111111 BASICMENU APPS0001,APPS0005,APPS0008,APPS1245
2 USER01 AAA001 111111111 LOGIN APPS0013,APPS1291
3 USER02 BBB0001 222222222 CASHIER001 APPS01SF,APPS12RE,APPSZS45,APPS178E,APPS12DF,APPS1RE5
4 USER02 BBB0001 222222222 BASICMENU APPSTY45,APPS1KJ5
注:这些都是显示每个表中的记录。
- 的TABLE_1:user_code/charge_code/unit_code
- 的TABLE_2:role_code/apps_code
- 的TABLE_3:role_code/user_code
我想实现这样的查询:
SELECT table_2.roles_code, wm_concat(table_2.apps_code) AS apps
FROM table_2
GROUP BY table_2.roles_code;
你为什么要在汇总(逗号分隔)格式输出?也许有更有效的方法来做你最终需要做的事情。 – mathguy
输出格式不重要......我只需要一行中的所有值。 @mathguy – spikeTJ
你能推荐我一个更有效的方法吗? @mathguy – spikeTJ