mysqldump with multiple tables with or without where clause

Question

I have a set of tables in my database that I have to take a dump ( :D ) of. My problem is I want to take some data from some tables that only date back certain days and woul

Answer 1

make two dumps or if you dont want to make two dumps then try two command

a.

mysqldump -h<hostname> -u<username> -p 
<databasename>  <table1> <table2> <table3>
--single-transaction --no-create-info > dumpfile.sql

b.

mysqldump -h<hostname> -u<username> -p <databasename> 
<table4> --where 'created > DATE_SUB(now(), INTERVAL 7 DAY)',
<table5> --where 'created > DATE_SUB(now(), INTERVAL 7 DAY)
--single-transaction --no-create-info >> dumpfile.sql

c.

gzip dumpfile.sql

Answer 2

So the solution above won't work unless the tables have a common foreign key field.

If you look at my example below, the user_addresses, user_groups, and user_payment_methods all have the user_id field i common. When mysqldump executes the where clause it will filter those tables.

mysqldump -u <username> -p <password> 
user_addresses user_groups user_payment_methods 
-w "user_id 
in (select id from users where email like '%@domain.com')"
--single-transaction| gzip > sqldump.sql.gz