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 TABLE table_nameDROP INDEX index_name (MySQL) DROP TABLE DROP TABLE table_name EXISTS IF EXISTS (SELECT * FROM table_name WHERE id = ?)BEGIN-...
15. With SQL, how can you return all the records from a table named "Persons" sorted descending by "FirstName"? You answered: SELECT * FROM Persons ORDER BY FirstName DESC Correct Answer! 16. With SQL, how can you insert a new record into the "Persons" table? You answered: INSERT ...
INSERT INTOThe INSERT INTO command is used to insert new rows in a table.The following SQL inserts a new record in the "Customers" table:Example INSERT INTO Customers (CustomerName, ContactName, Address, City, PostalCode, Country) VALUES ('Cardinal', 'Tom B. Erichsen', 'Skagen 21', '...
In the SQL Shell application on your computer the operation above might look like this: In the next chapters we will learn how to insert data into a table, and also more on how to retrieve data from a table. PostgreSQL Exercises
The following SQL statement lists the number of customers in each country, sorted high to low:Example SELECT COUNT(CustomerID), CountryFROM CustomersGROUP BY Country ORDER BY COUNT(CustomerID) DESC; Try it Yourself » Demo DatabaseBelow is a selection from the "Orders" table in the ...
CREATE TABLE orders CREATE TABLE orders ( order_id SERIAL NOT NULL PRIMARY KEY, customer_id INT, order_date DATE ); Result CREATE TABLE The following SQL statement will fill the orders table with content:INSERT INTO orders INSERT INTO orders (order_id, customer_id, order_date) VALUES (...
The INSERT INTO SELECT command copies data from one table and inserts it into another table.The following SQL copies "Suppliers" into "Customers" (the columns that are not filled with data, will contain NULL):Example INSERT INTO Customers (CustomerName, City, Country) SELECT SupplierName, City...
❮ SQL Keywords ReferenceVALUESThe VALUES command specifies the values of an INSERT INTO statement.The following SQL inserts a new record in the "Customers" table:Example INSERT INTO Customers (CustomerName, ContactName, Address, City, PostalCode, Country) VALUES ('Cardinal', 'Tom B. Erichsen'...
The result object contains information about how the query affected the table.The result object returned from the example above looks like this:{ fieldCount: 0, affectedRows: 1, insertId: 0, serverStatus: 34, warningCount: 0, message: '', protocol41: true, changedRows: 0} ...
You can update existing records in a table by using the "UPDATE" statement:ExampleGet your own Node.js Server Overwrite the address column from "Valley 345" to "Canyon 123": var mysql = require('mysql'); var con = mysql.createConnection({ host: "localhost", user: "yourusername", ...