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Sometimes you need to use SQL to update values in all rows or columns of a table, whether to fix an error, update a status, or something else. This video will show you how to update data in SQL.
SQL Used
An update statement for all rows:
UPDATE <table> SET <column> = <value>;
The =
sign is different from an equality operator from a WHERE
condition. It's an assignment operator because you're assigning a new value to something.
Examples:
UPDATE users SET password = "thisisabadidea";
UPDATE products SET price = 2.99;
Update multiple columns in all rows:
UDPATE <table> SET <column 1> = <value 1>, <column 2> = <value 2>;
Examples:
UPDATE users SET first_name = "Anony", last_name = "Moose";
UPDATE products SET stock_count = 0, price = 0;
See all of the SQL used in Modifying Data With SQL in the Modifying Data With SQL Cheatsheet.
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