mysql备份并还原到具有不同列名的表

Question

I have a table - customers_old . I want to copy all the data from this table, so I will use mysqldump.

I need to restore data into a table , customers_new, which has column names different from customers_old table.

How do I do this?

INSERT..SELECT is only for manually copying each row?

Kindly advise

Thanks

Answer 1

To expand on PMV's answer:

INSERT INTO newtable (column1_new, column2_new, ...) 
  SELECT column1_old, column2_old FROM oldtable

Answer 2

You can do it with a simple ctas (Create Table AS) operation:

CREATE TABLE customers_new AS SELECT col1 AS new_col1, col2 AS new_col2 FROM customers_old

By aliasing your old columns you can change the column names in the new table.

see: http://dev.mysql.com/doc/refman/5.5/en/create-table-select.html

Answer 3

您可以在sql转储文件中编辑列名和表名，或者导入新表，然后从旧表执行INSERT SELECT。

Answer 4

You can't do this directly, unless you manually hack up the dump file to change the column names in there. One option would be to load the dump into a temporary database/table and then do some ALTER TABLE queries to rename the columns to whatever you want. Or you could do the INSERT/SELECT, but the you'd end up with double the data (new renamed table/fields + old original table/fields).