问题
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 would like to keep the remaining tables in tact.
The query I came up with was something like:
mysqldump -h<hostname> -u<username> -p <databasename>
<table1> <table2> <table3>
<table4> --where 'created > DATE_SUB(now(), INTERVAL 7 DAY)',
<table5> --where 'created > DATE_SUB(now(), INTERVAL 7 DAY)
--single-transaction --no-create-info | gzip
> $(date +%Y-%m-%d-%H)-dump.sql.gz
The trouble with the above code is that table1, table2 and table3 will try to take the where clause of table4. I don't want that cause that would spit out an error that created field does not exist in these tables.
I tried putting comma (,) after table names as I did after where clause but it doesn't work.
At this point I'm pretty much stuck and have no more alternative expect create two different sql dump files, which I wouldn't want to do.
回答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
回答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
来源：https://stackoverflow.com/questions/32368101/mysqldump-with-multiple-tables-with-or-without-where-clause