Difference between revisions of "Where clause"
Jump to navigation
Jump to search
(it can be used to join related tables) |
(for example, small cities, having population less than 1,000 people, will be selected) |
||
| Line 1: | Line 1: | ||
A '''where clause''' is used in [[Structured Query Language]] (SQL) to determine a subset records which should be returned from a larger whole. The where clause can function as a filter, selecting records that fit certain criteria, or it can be used to join related tables. | A '''where clause''' is used in [[Structured Query Language]] (SQL) to determine a subset records which should be returned from a larger whole. The where clause can function as a filter, selecting records that fit certain criteria, or it can be used to join related tables. | ||
| + | |||
| + | ==Examples== | ||
| + | |||
| + | SELECT city WHERE population < 1000 | ||
| + | |||
| + | Only small cities, having population less than 1,000 people, will be selected. | ||
Revision as of 23:09, August 2, 2007
A where clause is used in Structured Query Language (SQL) to determine a subset records which should be returned from a larger whole. The where clause can function as a filter, selecting records that fit certain criteria, or it can be used to join related tables.
Examples
SELECT city WHERE population < 1000
Only small cities, having population less than 1,000 people, will be selected.