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Querying data stores with SQL : Supported SQL and Extensions : Select : From Clause : Where Clause
  

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Where Clause

Purpose

Specifies the conditions that rows must meet to be retrieved.

Syntax

WHERE expr1 rel_operator expr2
where:
expr1
is either a column name, literal, or expression.
expr2
is either a column name, literal, expression, or subquery. Subqueries must be enclosed in parentheses.
rel_operator
is the relational operator that links the two expressions.

Example

This Select statement retrieves the first and last names of employees that make at least $20,000.
SELECT last_name, first_name FROM emp WHERE salary >= 20000

See also

Subqueries
SQL Expressions