SQL Commands - SQL Commands Reference. SQL Commands is a website demonstrating how to use the most frequently used SQL clauses. Vaccum Wiper Motor How To Install Hose.

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Let's have a look at database tables first. Each table consists of rows and columns. Each of the db table columns is identified by name and it has a specific data type. The rows store the information saved in the table.

Here is how a simple table looks like. Table Cities. City. IDCity. Name. State.

Los Angeles. California. New York. New York. Chicago. Illinois. SQL Command Types. We can divide the SQL commands in several major categories depending on their purpose - Data Definition Language (DDL), Data Control Language (DCL), Data Query Language (DQL), and Data Manipulation Language (DML).

We can use the DDL command CREATE to create a table. CREATE Table Cities. We do that using the SQL SELECT command.

SELECT CIty. ID, City. Name, State FROM Cities. The above SQL command will retrieve all rows from the database table.

You can also order the results of your SQL query by one or more columns. SELECT CIty. ID, City. Name, State FROM Cities ORDER BY State. You can also retrieve data conditionally using SQL WHERE clause. SELECT CIty. ID, City. Name, State FROM Cities WHERE ID > 2.

To learn in more detail about each of the SQL commands above please use the left navigation menu and watch our .