Using INSERT IGNORE Statements in mysqldump

The mysqldump command is a powerful utility in MySQL used for creating backups of databases. One of its options, --insert-ignore, allows users to generate SQL dump files that include INSERT IGNORE statements. These statements are useful when you want to insert data into a table but ignore duplicate key errors if any data already exists.

Here are several examples demonstrating the usage of --insert-ignore:

Example 1: Dumping a database with --insert-ignore:

mysqldump --insert-ignore -u username -p database_name > dump.sql

This command dumps the database database_name into dump.sql file with INSERT IGNORE statements, which ignore duplicate key errors during insertion.

Example 2: Dumping a specific table with --insert-ignore:

mysqldump --insert-ignore -u username -p database_name table_name > table_dump.sql

This command dumps only the table_name from database_name into table_dump.sql with INSERT IGNORE statements.

Example 3: Dumping multiple tables with --insert-ignore:

mysqldump --insert-ignore -u username -p database_name table1 table2 > multi_table_dump.sql

This command dumps table1 and table2 from database_name into multi_table_dump.sql with INSERT IGNORE statements.

Example 4: Dumping and compressing with --insert-ignore:

mysqldump --insert-ignore -u username -p database_name | gzip > dump.sql.gz

This command dumps the database database_name into a gzip-compressed file dump.sql.gz with INSERT IGNORE statements.

Example 5: Dumping with extended inserts and --insert-ignore:

mysqldump --insert-ignore --extended-insert=FALSE -u username -p database_name > dump.sql

This command disables extended inserts and dumps the database database_name into dump.sql with individual INSERT IGNORE statements for each row.

These examples illustrate the flexibility and utility of using --insert-ignore with mysqldump to handle database backups efficiently, especially in scenarios where duplicate data insertion errors need to be managed gracefully.

Also check similar articles.

Including Master Host and Port in mysqldump Output (Deprecated)
Including Source Host and Port in mysqldump Output
Ignoring Tables During mysqldump
Ignoring Errors During mysqldump
Connecting to MySQL Host in mysqldump