![]() Finally, we use the WHERE keyword to specify that only the record with the company ID 9 is to be updated. Then, with the SET keyword, we define which column (i.e., contact_name) is to be updated with what value (i.e., Pam Beesley). After the UPDATE keyword, we specify the name of the table we want to update. We want to update the contact name for the company with ID 9. Specifically, let’s say we’ve just learned the contact person for “Lots of Fun” has changed from Phyllis Vance to Pam Beesly. Let’s keep it simple and start with updating just one row of the table. We have a table of our suppliers, with the company ID, company name, contact person name, and volume of products and services provided in 2021 (in USD). The best way to understand how the SQL UPDATE works is to see it in action. If you are very new to SQL, I recommend taking the SQL Basics interactive course before moving to data manipulation language. With 52 interactive SQL exercises, you learn how to retrieve, store, modify, delete, insert, and update data with the SQL data manipulation language (DML). To learn all the basics of modifying databases, check out our interactive course How to INSERT, UPDATE, and DELETE Data in SQL. Check out this detailed guide for explanations and beginner-friendly examples of SQL UPDATE. Keeping databases up to date is one of the key responsibilities of data engineers, data administrators, and everyone working with databases. As we’ll see in this article, you can also update rows for a specified quantity from the top of your table. You may choose to update entire columns or update rows filtered with a WHERE statement. In SQL, an UPDATE statement modifies existing records of a table. Let’s explore how to update rows for a specified quantity from the top in SQL. Often, you need to update specific records you may even want to update only the first row, or the first 10, 100, or 1000 rows. ![]() Real-world databases require continuous updating. ![]()
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