问题
I want to keep t1,t2 and drop all other tables.
回答1:
You can use information_schema
to find table names, and even format the results as a bunch of DROP
statements.
SELECT CONCAT('DROP TABLE ', TABLE_NAME, '; ')
FROM information_schema.tables
WHERE table_schema = DATABASE() AND table_name NOT IN ('foo', 'bar', 'baz');
(The DATABASE()
function returns the currently use
'd database.)
Using PREPARE
and EXECUTE
, you could even avoid copy & paste, and (in MySQL 5.0.13 and later) write a stored procedure to do this.
回答2:
You could use mysqldump to generate a list of DROP TABLE statements, filter out the ones you don't want, then pipe it back into the mysql client. Here's how we build that up
First, here's a list of DROP TABLE table statements for the database
mysqldump -uUSERNAME -pPASSWORD--add-drop-table --no-data DATABASE| \
grep ^DROP
Now we can pipe that through grep with -v to invert the match - we want statements which don't mention the tables we're retaining (another way to do this would be --ignore-table options to mysqldump)
mysqldump -uUSERNAME -pPASSWORD--add-drop-table --no-data DATABASE| \
grep ^DROP |
grep -v 'foo\|bar'
Finally, once you're confident, you can pipe that back into mysql
mysqldump -uUSERNAME -pPASSWORD--add-drop-table --no-data DATABASE| \
grep ^DROP | \
grep -v 'foo\|bar' | \
mysql -uUSERNAME -pPASSWORD DATABASE
来源:https://stackoverflow.com/questions/1454328/is-there-a-mysql-command-to-implement-something-like-drop-tables-except-t1-b2