Help Center> GaussDB(for MySQL)> Troubleshooting> Backup and Restoration Issues> Commands for Exporting Data Through mysqldump
Updated on 2023-09-15 GMT+08:00

Commands for Exporting Data Through mysqldump

Background

mysqldump is the most commonly used tool for importing and exporting MySQL data.

mysqldump Options

Table 1 Option description

Option Name

Description

add-drop-table

Adds the DROP TABLE statement before each data table is created.

events, E

Exports events.

routines, R

Exports stored procedures and customized functions.

flush-logs

Updates logs before the logs are exported.

no-create-db, n

Exports only data without adding of the CREATE DATABASE statement.

add-drop-database

Adds the DROP DATABASE statement before each database is created.

no-create-info, t

Exports only data without adding of the CREATE TABLE statement.

no-data, d

Exports only table structure data.

set-gtid-purged=OFF

Does not export GTID statements.

hex-blob

Exports binary string fields in hexadecimal format.

Scenario

Examples are as follows:

  1. Export all data of databases db1 and db2.

    mysqldump -uroot -p -P8635 -h192.168.0.199 --hex-blob --set-gtid-purged=OFF --single-transaction --order-by-primary --flush-logs -q --databases db1 db2 >db12.sql

  2. Export the t1 and t2 tables of database db1.

    mysqldump -uroot -p -P8635 -h192.168.0.199 --hex-blob --set-gtid-purged=OFF --single-transaction --order-by-primary --flush-logs -q --databases db1 --tables t1 t2 >t1_t2.sql

  3. Export data whose id equals 1 from table t1 in database db1.

    mysqldump -uroot -p -P8635 -h192.168.0.199 --hex-blob --set-gtid-purged=OFF --single-transaction --order-by-primary --flush-logs -q --databases db1 --tables t1 --where='id=1'>t1_id.sql

  4. Export all table structures in database db1 without exporting data.

    mysqldump -uroot -p -P8635 -h192.168.0.199 --no-data --set-gtid-purged=OFF --single-transaction --order-by-primary -n --flush-logs -q --databases db1 >db1_table.sql

  5. Export all data excluding the tables and data in database db1.

    mysqldump -uroot -p -h192.168.0.199 -P8635 --set-gtid-purged=OFF -F -n -t -d -E -R db1> others.sql