If you don't want select all rows from a table, you can specify a WHERE clause to tell the query to return only the rows that meets the condition defined in the WHERE clause. The WHERE clause condition is a normal Boolean expression. If any data from the table needs to be used in the Boolean expression, column names should be used to represent the table data.

The first select statement below only returns rows that have url names containing the letter "a". The second select statement returns no rows, because the WHERE clause results FALSE for all rows in the table.

SELECT * FROM ggl_links WHERE url LIKE '%s%'

GO

id url notes counts created

102 rendc.org/sql NULL 0 2007-05-19

103 rendc.org/xslt NULL NULL 2007-05-19

SELECT * FROM ggl_links WHERE id < 100

GO

0 row