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1What is SQL?
2Table basics
3Selecting data
4Creating tables
5Inserting into a table
6Updating records
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Table Basics

A relational database system contains one or more objects called tables. The data or information for the database are stored in these tables. Tables are uniquely identified by their names and are comprised of columns and rows. Columns contain the column name, data type, and any other attributes for the column. Rows contain the records or data for the columns. Here is a sample table called "weather".

city, state, high, and low are the columns. The rows contain the data for this table:

Weather
citystatehighlow
Phoenix Arizona 105 90
Tucson Arizona 101 92
Flagstaff Arizona 88 69
San Diego California 77 60
Albuquerque New
Mexico
80 72
 

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