Update cheatsheets

mysql

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mysql
+
+> The MySQL command-line tool.
+> More information: <https://www.mysql.com/>.
+
+- Connect to a database:
+
+`mysql {{database_name}}`
+
+- Connect to a database, user will be prompted for a password:
+
+`mysql -u {{user}} --password {{database_name}}`
+
+- Connect to a database on another host:
+
+`mysql -h {{database_host}} {{database_name}}`
+
+- Connect to a database through a Unix socket:
+
+`mysql --socket {{path/to/socket.sock}}`
+
+- Execute SQL statements in a script file (batch file):
+
+`mysql -e "source {{filename.sql}}" {{database_name}}`
+
+- Restore a database from a backup created with `mysqldump` (user will be prompted for a password):
+
+`mysql --user {{user}} --password {{database_name}} < {{path/to/backup.sql}}`
+
+- Restore all databases from a backup (user will be prompted for a password):
+
+`mysql --user {{user}} --password < {{path/to/backup.sql}}`