Note and execute shell commands for Mysql queries. mysql executes shell commands.

Note and execute shell commands for Mysql queries. mysql executes shell commands.

Mysql query notes

1. when querying mysql, you must add the database prefix before the table. Otherwise, the database is the current database by default (when multiple databases are queried, duplicate queries may occur to the same table multiple times)

2 .\! Ls-al, mysql can execute shell External commands (note \! And ls)

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