now there are two tables, as shown in the figure
the question is: how do I write a sql statement to query the data that contains a field (user_id) in Table 2 (m_top_user_list)? Thank you ~
now there are two tables, as shown in the figure
the question is: how do I write a sql statement to query the data that contains a field (user_id) in Table 2 (m_top_user_list)? Thank you ~
select t2.* from T1 LEFT JOIN t 2 where find_in_set (t 1.userkeeper dagger t2.m recording topical usernames list)
select * from T2 LEFT JOIN T1 ON T2. M_top_user_list like'% T1. User_id%'
Database test content statistics userName= fight a total of several items. : : data shows SQL COUNT Grammar: SQL COUNT (DISTINCT column_name) Syntax COUNT (DISTINCT column_name) function returns the number of different values for the speci...
it was fine before rebooting, but after rebooting, it will never be able to start again root@iZuf6acp86oa3jizjzwaqdZ:~-sharp service mysql start Job for mysql.service failed because the control process exited with error code. See "systemctl status...