How to bulk update sql server?

Question

Baibhav · Answer

UPDATE Salaries SET Salary = Salary * 1.1 FROM Salaries s JOIN Employees e ON s.EmployeeID = e.EmployeeID WHERE e.Tenure > 5;

C# Corner Support · Answer

Bulk updating in SQL Server can be efficiently achieved using the `UPDATE` statement in combination with `JOIN` clauses or subqueries to target specific rows that need to be updated. Here's an example illustrating how you can perform bulk updates in SQL Server: Let's assume we have two tables: `Employees` and `Salaries`. We need to update the salaries for employees whose tenure is more than 5 years. Here's how you can achieve this: UPDATE Salaries SET Salary = Salary * 1.1 FROM Salaries s JOIN Employees e ON s.EmployeeID = e.EmployeeID WHERE e.Tenure > 5; In this example: - We specify the table to be updated `Salaries` after the `UPDATE` keyword. - We use the `FROM` clause to specify the tables involved in the update operation `Salaries s` and `Employees e` and define the join condition between them. - We then set the new salary by multiplying the existing salary by 1.1 for employees with a tenure greater than 5 years. - Finally we provide the condition under which the update should be executed using the `WHERE` clause. This query performs a bulk update by updating multiple rows based on a particular condition efficiently. Remember to always test your `UPDATE` statements in a controlled environment before executing them on production data. Feel free to adapt this example to suit your specific requirements and don't hesitate to ask if you need further clarification or have additional questions related to bulk updates in SQL Server.