About the Easysoft ODBC-Firebird Driver

SELECT * FROM Customers

-- Which different sales regions are there?
SELECT DISTINCT Region AS Different_Regions FROM SalesOrders
-- How many different sales regions are there?
SELECT COUNT(DISTINCT Region) AS Different_Regions FROM SalesOrders

SELECT
  OrderDate,
  SalesRepresentative
FROM
  SalesOrders
WHERE
  Region = 'Eastern'

SELECT
  OrderDate,
  SalesRepresentative
FROM
  SalesOrders
WHERE
  Region = 'Eastern'
  OR Region = 'Western'

SELECT
  OrderDate,
  SalesRepresentative
FROM
  SalesOrders
WHERE
  Region = 'Eastern'
  AND EXTRACT (YEAR FROM OrderDate) = 2025

cursor.execute("SELECT
  OrderDate,
  SalesRepresentative
FROM
  SalesOrders
WHERE
  Region = ?", ['Eastern'])

SELECT
  OrderDate,
  SalesRepresentative
FROM
  SalesOrders
WHERE
  NOT Region = 'Eastern'

SELECT
  *
FROM
  SalesOrders
ORDER BY
  OrderDate ASC

SELECT
  *
FROM
  Contacts
ORDER BY
  (
    CASE
      WHEN Surname IS NULL THEN Title
      ELSE Surname
    END
  );

SELECT
    COUNT(Id) As "Number",
    ProductID
FROM
    SalesOrderItems
GROUP BY
    ProductID

SELECT
    COUNT(Id) As "Number",
    ProductID
FROM
    SalesOrderItems
GROUP BY
    ProductID
HAVING
  COUNT(Id) > 100;

SELECT Max(Quantity) FROM SalesOrderItems
SELECT Sum(Quantity) FROM SalesOrderItems

SELECT CAST(Quantity AS Char(100))FROM  SalesOrderItems

SELECT ProductID FROM SalesOrderItems WHERE Quantity BETWEEN 10 AND 20

SELECT City FROM Contacts
UNION
SELECT City FROM Customers

SELECT SalesOrders.ID, Customers.Surname, SalesOrders.OrderDate
FROM SalesOrders
INNER JOIN Customers ON SalesOrders.CustomerID=Customers.ID;

SELECT Surname, GivenName FROM Customers WHERE CompanyName LIKE 'R%'
SELECT Surname, GivenName FROM Customers WHERE CompanyName LIKE '_he'

SELECT * FROM Customers WHERE CompanyName IS NULL

SELECT
  OrderDate,
  SalesRepresentative
FROM
  SalesOrders
WHERE
  Region = 'Eastern'
  OR Region = 'Western'
  OR Region = 'Central'

SELECT
  OrderDate,
  SalesRepresentative
FROM
  SalesOrders
WHERE
  Region IN  ('Eastern', 'Western', 'Central')

SELECT FIRST 10 * FROM Customers

SELECT
  Name
FROM
  Products
WHERE
  EXISTS (
    SELECT
     *
    FROM
      SalesOrderItems
    WHERE
     Products.ID = SalesOrderItems.ProductID
      AND Quantity < 20
  )

INSERT INTO
    Customers (
        Surname,
        GivenName,
        City,
        Phone,
        CompanyName
    )
VALUES
    (
        'Devlin',
        'Michaels',
        'Kingston',
        '2015558966',
        'PowerGroup'
    )

EXEC ('INSERT INTO Customers (Surname, GivenName, City, Phone, CompanyName)
VALUES (''Devlin'' , ''Michaels'' , ''Kingston'' , ''2015558966'' , ''PowerGroup'')')

DECLARE
  num_rows integer;
BEGIN
num_rows:=DBMS_HS_PASSTHROUGH.EXECUTE_IMMEDIATE@FirebirdLink
('INSERT INTO Customers (Surname, GivenName, City, Phone, CompanyName) VALUES (''Devlin'', ''Michaels'', ''Kingston'', ''2015558966'', ''PowerGroup'')');
END;
/

my $sth = $dbh->prepare(q/INSERT INTO Customers (Surname, GivenName, City, Phone, CompanyName) VALUES (?, ?, ?, ?, ?)/)
    or die "Can't prepare statement: $DBI::errstr";

$sth->execute('Devlin', 'Michaels', 'Kingston', '2015558966', 'PowerGroup');

UPDATE Customers
SET
  Surname = 'Jones'
WHERE
  Account_Id = 'PowerGroup'

my $sth = $dbh->prepare('UPDATE Customers SET Surname = \'Jones\' WHERE CompanyName = ?')
    or die "Can't prepare statement: $DBI::errstr";

$sth->execute('PowerGroup');

-- Delete (mark inactive) a bank account
DELETE FROM Customers WHERE CompanyName = 'PowerGroup'

sql = "DELETE FROM Customers WHERE CompanyName = ?"
cursor.execute(sql, 'PowerGroup')