Most Important SQL Commands

by

The Most Important SQL Commands :
SQL commands are indeed widely used for inserting, searching, updating, and deleting database records. Here’s a brief explanation of how SQL facilitates these operations:

SELECT :


Select statement is use to Retrieves data from a database table. It allows users to specify which columns you want to retrieve and can include conditions to filter rows.

#Select all columns from a table
SELECT * FROM Employees;

# Select specific columns
SELECT FirstName, LastName FROM Employees;

# Select with condition
SELECT * FROM Employees WHERE Age > 30;
UPDATE :


Update statement use to Modifies/Update existing data in a database table. It allows users to change values in specific columns based on specified conditions.

# Update a specific record
UPDATE Employees SET Age = 31 WHERE EmployeeID = 1;

# Update multiple columns
UPDATE Employees SET FirstName = 'Jane', LastName = 'Doe' WHERE EmployeeID = 2;
DELETE :

Removes data from a database table. It deletes rows that match with the specific conditions.

# Delete a specific record
DELETE FROM Employees WHERE EmployeeID = 1;

# Delete all records in a table (use with caution)
DELETE FROM Employees;

Leave a Comment