MySQL Insert into Multiple Tables for User Registration

When creating a user registration system, it's often necessary to insert data into multiple tables simultaneously. This can be achieved using a single MySQL INSERT statement that inserts data into multiple tables at once. In this article, we will explore how to use a single MySQL INSERT statement to insert multiple rows into a table.

The first step is to create the necessary tables for user registration. Let's assume we have two tables: `User` and `UserDetails`. The `User` table has columns `UserID`, `Name`, and `Password`, while the `UserDetails` table has columns `UserID`, `FullName`, `MobileNumber`, and `EMail`.

To insert data into these tables, you can use a single MySQL INSERT statement that inserts data into both tables. For example:

```sql

INSERT INTO User (Name, Password) VALUES ('John Doe', 'password123');

INSERT INTO UserDetails (UserID, FullName, MobileNumber, EMail)

VALUES (LAST_INSERT_ID(), 'John Doe', '0123456789', 'johndoe@example.com');

```

In this example, the first INSERT statement inserts data into the `User` table and generates an auto-incremented primary key (`UserID`) for each row. The second INSERT statement then uses the `LAST_INSERT_ID()` function to retrieve the generated primary key and insert it into the `UserDetails` table.

Alternatively, you can use a single MySQL INSERT statement with multiple values separated by commas:

```sql

INSERT INTO User (Name, Password) VALUES

('John Doe', 'password123'),

('Jane Doe', 'password456');

```

This method allows you to insert multiple rows into the `User` table at once. However, it does not provide a way to generate an auto-incremented primary key for each row.

To overcome this limitation, you can use a combination of INSERT statements and LAST_INSERT_ID() function:

```sql

INSERT INTO User (Name, Password) VALUES

('John Doe', 'password123'),

('Jane Doe', 'password456');

SET @userID = LAST_INSERT_ID();

INSERT INTO UserDetails (UserID, FullName, MobileNumber, EMail)

VALUES (@userID, 'John Doe', '0123456789', 'johndoe@example.com'),

(@userID, 'Jane Doe', '9876543210', 'janedoe@example.com');

```

When working with APIs, it's common to pass identifiers like table name or column name as method arguments. This allows for flexible and reusable code that can be easily adapted to different scenarios.

In conclusion, MySQL provides several ways to insert data into multiple tables simultaneously using a single INSERT statement. By combining these methods, you can create efficient and scalable user registration systems that handle multiple rows of data with ease.

Mysql insert into multiple tables for user registration