Can you explain Insert, Update and Delete query

Insert statement is used to insert new rows in to table. Update to update existing data in the table. Delete statement to delete a record from the table. Below code snippet for Insert, Update and Delete :-

  • INSERT INTO pcdsEmployee SET name=’rohit’,age=’24’;
  • UPDATE pcdsEmployee SET age=’25’ where name=’rohit’;
  • DELETE FROM pcdsEmployee WHERE name = ‘sonia’;

Sure, here’s a brief explanation of Insert, Update, and Delete queries in a database management system (DBMS):

  1. Insert Query: An Insert query is used to add new records or rows of data into a database table. It typically follows this syntax:
    sql
    INSERT INTO table_name (column1, column2, ...)
    VALUES (value1, value2, ...);

    For example:

    sql
    INSERT INTO Employees (EmployeeID, FirstName, LastName, Age)
    VALUES (101, 'John', 'Doe', 30);

    This query would insert a new record into the “Employees” table with the specified values for each column.

  2. Update Query: An Update query is used to modify existing records in a database table. It typically follows this syntax:
    sql
    UPDATE table_name
    SET column1 = value1, column2 = value2, ...
    WHERE condition;

    For example:

    sql
    UPDATE Employees
    SET Age = 31
    WHERE EmployeeID = 101;

    This query would update the “Age” column of the record in the “Employees” table where the “EmployeeID” is 101.

  3. Delete Query: A Delete query is used to remove existing records from a database table. It typically follows this syntax:
    sql
    DELETE FROM table_name
    WHERE condition;

    For example:

    sql
    DELETE FROM Employees
    WHERE EmployeeID = 101;

    This query would delete the record from the “Employees” table where the “EmployeeID” is 101.

These queries are fundamental to manipulating data within a database and are essential for maintaining the integrity and accuracy of the data stored within.