Copy data from one mysql table to another mysql table of same database

Question

I have around 40 million rows in a MySQL table. I want to copy this table into another table of same database. What is the most efficient way to do this? How much time will it take (approx.)?

Answer 1

Try this

CREATE TABLE new_table LIKE old_table;
INSERT INTO new_table SELECT * FROM old_table;

Answer 2

INSERT INTO table2(column1,column2,....) SELECT column1,column2,... FROM table1;

Answer 3

create table new_table as select * from Old_table;

当您以这种方式复制数据时，如果创建表单独的查询并通过单独的查询约束插入数据，则所有约束也都将复制到新表中，而不会在新表中复制