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Exercise: SQL AliasesWhich SQL statement creates an alias for the CustomerID column as 'ID'?SELECT CustomerID = 'ID' FROM Customers; SELECT CustomerID AS ID FROM Customers; SELECT CustomerID TO ID FROM Customers; SELECT CustomerID 'ID' FROM Customers;...
1. What does SQL stand for? You answered: Structured Query Language Correct Answer! 2. Which SQL statement is used to extract data from a database? You answered: SELECT Correct Answer! 3. Which SQL statement is used to update data in a database? You answered: UPDATE Correct Answer!
SQL StatementSyntax AND / OR SELECT column_name(s)FROM table_nameWHERE conditionAND|OR condition ALTER TABLE ALTER TABLE table_name ADD column_name datatype or ALTER TABLE table_name DROP COLUMN column_name AS (alias) SELECT column_name AS column_aliasFROM table_name or SELECT column_name...
The BACKUP DATABASE command is used in SQL Server to create a full back up of an existing SQL database.The following SQL statement creates a full back up of the existing database "testDB" to the D disk:Example BACKUP DATABASE testDBTO DISK = 'D:\backups\testDB.bak'; ...
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Note:Not all database systems supportSELECT TOP. MySQL usesLIMIT, and Oracle usesROWNUM. The following SQL statement selects the first three records from the "Customers" table: Example SELECTTOP3*FROMCustomers; Try it Yourself » The following SQL statement shows the equivalent example using the...
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
The following SQL statement selects all orders with customer and shipper information:Example SELECT Orders.OrderID, Customers.CustomerName, Shippers.ShipperNameFROM ((OrdersINNER JOIN Customers ON Orders.CustomerID = Customers.CustomerID) INNER JOIN Shippers ON Orders.ShipperID = Shippers.ShipperID); ...
SQL in Web Pages SQL injection usually occurs when you ask a user for input, like their username/userid, and instead of a name/id, the user gives you an SQL statement that you willunknowinglyrun on your database. Look at the following example which creates aSELECTstatement by adding a ...