This chapter is from the book
This chapter is from the book
This chapter is from the book
This chapter is from the book
Retrieving Individual Columns
We’ll start with a simple SQL SELECT statement, as follows:
Input
SELECT prod_name FROM products;
Analysis
The previous statement uses the SELECT statement to retrieve a single column called prod_name from the products table. The desired column name is specified right after the SELECT keyword, and the FROM keyword specifies the name of the table from which to retrieve the data. The following shows the output from this statement:
Output
+----------------+ | prod_name | +----------------+ | .5 ton anvil | | 1 ton anvil | | 2 ton anvil | | Oil can | | Fuses | | Sling | | TNT (1 stick) | | TNT (5 sticks) | | Bird seed | | Carrots | | Safe | | Detonator | | JetPack 1000 | | JetPack 2000 | +----------------+
A simple SELECT statement like the one just shown returns all the rows in a table. Data is not filtered (so as to retrieve a subset of the results), nor is it sorted. We’ll discuss these topics in the next few lessons.