What is the usage of “mysql select into”?

The SELECT INTO statement in MySQL is used to insert the results of a query into another table. Here is how it works:

1. Create a new table and insert query results: The SELECT INTO statement can be used to create a new table in the database and insert the query results into it. The syntax is as follows:
2. Create a new table by selecting certain columns from an existing table based on a specified condition.
3. This statement will select data from the table_name table that meets the condition and insert the results into the new_table table. Please note that the new_table table must not exist beforehand.
4. To insert into an existing table: If you want to insert query results into an existing table, you can use the INSERT INTO SELECT statement. The syntax is as follows:
5. Add data from another table into an existing table based on a specified condition.
6. This statement will select data from the table_name table that meets the condition and insert the results into the specified column of the existing_table table.

Please note that both of the above methods allow for selecting specific columns to insert as needed, rather than inserting all columns into the target table.