(Note: Deletes the entire table!!) DELETE * FROM table_name (Note: Deletes the entire table!!) DROP DATABASE DROP DATABASE database_name DROP INDEX DROP INDEX table_name.index_name (SQL Server)DROP INDEX index_name ON table_name (MS Access)DROP INDEX index_name (DB2/Oracle)ALTER TA...
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UPDATE Persons SET LastName='Nilsen' WHERE LastName='Hansen' Correct Answer! 19. With SQL, how can you delete the records where the "FirstName" is "Peter" in the Persons Table? You answered: DELETE FROM Persons WHERE FirstName = 'Peter' Correct Answer! 20. With SQL, how can you ...
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What is the primary purpose of the SQL SELECT INTO statement? To update data in an existing table To copy data from one table into a new table To delete data from a table To create an index on a table Submit Answer » What is an Exercise? Test what you learned in the chapter: ...
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SQLNULL Values ❮ PreviousNext ❯ What is a NULL Value? A field with a NULL value is a field with no value. If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this field. Then, the field will be saved with...
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❮ PreviousNext ❯ SUM TheSUM()function returns the total sum of a numeric column. The following SQL statement finds the sum of thequantityfields in theorder_detailstable: Example Return the total amount of ordered items: SELECT SUM(quantity) ...
The following SQL will update the "ContactName" field to "Juan" for all records where Country is "Mexico": Example UPDATECustomers SETContactName='Juan' WHERECountry='Mexico'; Try it Yourself » Note:Be careful when updating records in a table! Notice the WHERE clause in the UPDATE statem...