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Remove table prefixes MySQL
# Set @database, @old_prefix and @new_prefix (if you want a different prefix instead of removing)
# Execute the Generated SQL Query this generates to rename all tables found with prefix.
SET SESSION group_concat_max_len = 999999999;
SET @database = "databasename";
SET @old_prefix = "mgn_";
SET @new_prefix = "";
SELECT GROUP_CONCAT("RENAME TABLE ", TABLE_NAME, " TO ", replace(TABLE_NAME, @old_prefix, @new_prefix),'; ' separator '')
FROM information_schema.TABLES WHERE TABLE_SCHEMA = @database AND TABLE_NAME LIKE CONCAT(@old_prefix, '%');
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