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Asked: 2024-09-26T22:20:56+05:30 In:

how to insert multiple rows in sql

I’m currently working on a project that requires me to insert multiple rows into a SQL database table, and I’m feeling a bit overwhelmed by the different methods available. I have a table set up, but I’m unsure about the best way to add several records without having to run individual insert statements for each one. I’ve read about using multiple INSERT statements, but I worry that this could be inefficient and slow, especially with a large dataset.

I also came across the option of using a single INSERT statement with multiple value sets, which seems to be a more streamlined approach, but I’m not quite sure how the syntax works or if there are limitations to this method.

Moreover, I’m concerned about the possibility of encountering errors during these operations. What happens if one of the rows fails to insert? Will the entire transaction roll back, or can I set it up in a way that allows the other rows to be inserted successfully? I’d appreciate any guidance on the best practices for inserting multiple rows into SQL and how to ensure that the process goes smoothly. Thank you!

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    2 Answers

    1. Inserting Multiple Rows in SQL – Rookie Style!

      Okay, so you wanna add a bunch of rows to your SQL database, huh? Here’s a super simple way to do it! Let’s go!

      1. Know Your Table!

      First, make sure you know the name of your table and the columns you need to fill. Like, if you have a table called students with name and age, we’re good to go!

      2. The Basic Insert Command

      The general format for inserting stuff looks like this:

      INSERT INTO table_name (column1, column2) VALUES (value1, value2);

      For adding multiple rows, just keep adding more VALUES like this!

      3. Putting it All Together

      Here’s how you’d do it for our students table:

      INSERT INTO students (name, age) VALUES 
('Alice', 20), 
('Bob', 21), 
('Charlie', 22);

      Boom! Three new students added in one go!

      4. Make Sure to Use Quotes

      Oh! Don’t forget to use single quotes around text values (like names), but no quotes for numbers (like age).

      5. Don’t Forget the Semicolon!

      And wrap it all up with a semicolon at the end or SQL will be like “what are you doing?” 😂

      6. Run the Query!

      Finally, you just gotta run your SQL command in your database tool, and voilà! You’ve added rows like a champ!

      7. Don’t Panic!

      If it doesn’t work, don’t freak out! Check your table names, column names, and make sure you’re not missing any commas! Learning is part of the process! You got this! 🚀


    2. To insert multiple rows into a SQL table, you can leverage the `INSERT INTO` statement combined with the `VALUES` keyword to specify multiple sets of values in a single command. This approach is both efficient and reduces the number of individual queries sent to the database server, which can enhance performance. The general syntax is as follows:
      “`sql
      INSERT INTO table_name (column1, column2, column3)
      VALUES
      (value1a, value2a, value3a),
      (value1b, value2b, value3b),
      (value1c, value2c, value3c);
      “`
      In this syntax, make sure to replace `table_name` with the actual name of your table and list the columns you want to populate. Each set of parentheses represents a new row to be inserted, and this can be repeated for as many rows as needed.

      In addition to the simple `INSERT` statement, you can utilize the `INSERT INTO … SELECT` statement to insert rows based on the result of a `SELECT` query. This is particularly useful for appending data from one table to another or for inserting computed or aggregated values derived from existing data. The syntax looks like this:
      “`sql
      INSERT INTO table_name (column1, column2)
      SELECT columnA, columnB
      FROM another_table
      WHERE condition;
      “`
      In this statement, you would replace `another_table` and `condition` as per your requirements. This method provides not only the ability to insert multiple rows in one go but also the flexibility to transform data as it is being inserted.

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