1

I'd like to fetch the last 100 rows of a table via a mysqldump, but I already have the rest of the table. How can I only fetch the last 100 rows for a mysqldump and then replace (or overwrite) any duplicates I may have?

db1 Incremental Export

mysqldump -umy_user my_db1 my_table --single-transaction --replace --where="id > 900" | pigz > my_db1-my_table.sql.gz

db2 Incremental Import

pv my_db1-my_table.sql.gz | gunzip | mysql -umy_user my_db2

Unfortunately the mysqldump above creates a drop table my_table query. How can I skip this?

What I want to happen...

Say db2 has 950 records. And db1 has 1000. I want records 901-1000 from db1 on db2, as well as the 1-900 already on db2 (just leave them be). Replacing/Overwriting records 901-950 on db2 is preferred.

What Currently Happens...

After running the above, db2 only contains records 901-1000, and is now missing 1-900 (due to drop table).

1 Answer 1

3

You can use replace into flag (--replace) and where condition (--where) while also omitting the create statement (-t):

mysqldump -t --replace --where="id between 901 and 1000" my_db1 table my_table

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.