Temporary table in Mysql

A temporary table in MySQL is a special type of table that exists only for the duration of the database session or connection. It is useful for storing and manipulating temporary data within a specific session or transaction. Temporary tables are automatically dropped when the session ends or the connection is closed.

Temporary tables can be created using the CREATE TEMPORARY TABLE statement. Here's a detailed explanation of how to create a temporary table in MySQL:

Connect to the MySQL server: Open a command-line interface or a terminal and enter the following command, replacing <username> and <password> with your MySQL username and password:

Syntax:
                
    mysql -u <username> -p
                
            

Once you are connected to the MySQL server, you will see a prompt where you can enter commands.

Create a temporary table:

There are way to create a temporary table using the CREATE TEMPORARY TABLE statement:

Syntax:
                
    CREATE TEMPORARY TABLE temp_table (
        column1 datatype,
        column2 datatype,
        ...
    );
                
            

Replace temp_table with the desired name for your temporary table, and define the columns and their data types as needed.

Insert data into the temporary table: Once the temporary table is created, you can insert data into it using the INSERT INTO statement, similar to inserting data into a regular table. Here's an example:

Syntax:
                
    INSERT INTO temp_table (column1, column2, ...)
    VALUES (value1, value2, ...);
                
            

Use the temporary table: You can perform various operations on the temporary table within the current session or transaction. This includes selecting, updating, deleting, or joining the temporary table with other tables.

Drop the temporary table: Temporary tables are automatically dropped when the session ends or the connection is closed. However, if you want to explicitly drop the temporary table before that, you can use the DROP TABLE statement:

Syntax:
                
    DROP TABLE temp_table;
                
            

That's it! You have successfully created and used a temporary table in MySQL.

Here's an example of the entire process:

Response of All Database

In this example, a temporary table named "temp_table" is created with two columns: "id" and "name". Data is inserted into the temporary table, and then it is queried using the SELECT statement. Finally, the temporary table is dropped using the DROP TABLE statement.

Note: Temporary tables are session-specific, meaning they are only accessible within the same session or connection. They cannot be shared or accessed by other