MySQL: Moving table from one db to another

To move one table from one db to another, you can create new table (create table foo_new like foo) in db where you want to move table and then copy data with insert into/select query. However there is much easier way which is especially handy when you deal with big tables.

As you probably aready know, there is easy way to rename MySQL table just by issuing rename clause in alter statement:

ALTER TABLE foo RENAME TO new_foo;

You can also use RENAME TABLE syntax like this:

RENAME TABLE foo TO new_foo;

Now, when you need to move table from one db to another, all you have to do is to specify it’s current db and new db name as table prefix. For example if you want to move table foo from current db to new db you can issue queries like these:

ALTER TABLE currentdb.foo RENAME TO newdb.foo;

or

RENAME TABLE currentdb.foo TO newdb.foo;

Btw there is important difference between ALTER and RENAME statements in a way that with RENAME you can rename more than one tables at once. This comes handy if you want for example to swap names of two tables:

RENAME TABLE table1 TO temp, table2 TO table1, temp TO table2;

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