With SQL, how can you return the number of records in the "Persons" table?
The COUNT() function returns the number of rows that match a specified criterion.
SELECT COUNT(column_name) FROM table_name WHERE condition;
COUNT() Example is given as follows:
The following SQL statement finds the number of courses:
SELECT COUNT(CourseID) FROM SlghtBook;
With SQL, how can you delete the records where the "FirstName" is "Peter" in the Persons Table?
How can you change "Hansen" into "Nilsen" in the "LastName" column in the Persons table?
With SQL, how can you insert "Olsen" as the "LastName" in the "Persons" table?
With SQL, how can you insert a new record into the "Persons" table?
With SQL, how can you return all the records from a table named "Persons" sorted descending by "FirstName"?