[Advanced command operation of Mysql]

1、show create table demo

 2、show columns from demo

 

3、show full tables

4、show table STATUS

 5、 show open tables;

This command can check which tables are currently open. The In_use column indicates how many threads are using a table, and Name_locked indicates whether the table name is locked, which generally occurs when the Drop or Rename command operates on this table. So this command can't help answer our common questions: whether there is a deadlock in a certain table, who owns the lock on the table, etc.

 6. View the transaction being locked

      SELECT * FROM INFORMATION_SCHEMA.INNODB_LOCKS; 

    View transactions waiting for locks

     SELECT * FROM INFORMATION_SCHEMA.INNODB_LOCK_WAITS;