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The WHERE clause is used to extract only those records that fulfill a specified criterion.

Simple SQL WHERE Syntax:

SELECT column_name(s)
FROM table_name
WHERE column_name operator value

Simple WHERE Clause Example

The "Persons" table:

Id LastName FirstName Address City
1 Larson Sue 3 Cherry Chicago
2 Roberts Teri 21 Brown Chicago
3 Peterson Kari 30 Mell Reno

If you want to select only the persons living in the city "Chicago" from the table above, use the following SELECT statement:

WHERE City='Chicago'

The result-set will look like this:

Id LastName FirstName Address City
1 | Lar son | Sue

|3 Ch

erry | Chi cago
2 | Rob erts | Ter i |21 B rown | Chi cago