SQL PART 4 G

GROUP BY column

HAVING SUM(column) condition value

This "Sales" Table:

Company Amount

W3Schools 5500

IBM 4500

W3Schools 7100

This SQL:

SELECT Company,SUM(Amount) FROM Sales GROUP BY Company HAVING SUM(Amount)>10000

Returns this result:

Company SUM(Amount)

W3Schools 12600

SQL The SELECT INTO Statement

The SELECT INTO Statement

The SELECT INTO statement is most often used to create backup copies of tables or for archiving records.

Syntax

SELECT column_name(s) INTO newtable [IN externaldatabase] FROM source

Make a Backup Copy

The following example makes a backup copy of the "Persons" table:

SELECT * INTO Persons_backup FROM Persons

The IN clause can be used to copy tables into another database:

SELECT Persons.* INTO Persons IN 'Backup.mdb' FROM Persons

If you only want to copy a few fields, you can do so by listing them after the SELECT statement:

SELECT LastName,FirstName INTO Persons_backup FROM Persons

You can also add a where clause. The following example creates a "Persons_backup" table with two columns (FirstName and LastName) by extracting the persons who lives in "Sandnes" from the "Persons" table:

SELECT LastName,Firstname INTO Persons_sandnes FROM Persons WHERE City='Sandnes'

Selecting data from more than one table is also possible. The following example creates a new table "Empl_Ord_backup" that contains data from the two tables Employees and Orders:

SELECT Employees.Name,Orders.Product INTO Empl_Ord_backup FROM Employees

INNER JOIN Orders

ON Employees.Employee_ID=Orders.Employee_ID