Web Reference: Note: Be careful when updating records in a table! Notice the WHERE clause in the UPDATE statement. The WHERE clause specifies which record (s) that should be updated. If you omit the WHERE clause, all records in the table will be updated! Suppose the employee id 192 Sarah Bell changed her last name from Bell to Lopez and you need to update her record in the employeestable. To update Sarah’s last name from Bell to Lopez, you use the following UPDATEstatement: Try it The database system updated value in the last_name column and the row with employee_id 192. You can verify it by using ... The UPDATE statement in SQL is used to modify existing records in a table. You can update one or more columns for one or more rows based on a condition (using the WHERE clause).
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