Select

Purpose

Fetches results from one or more tables. It can operate on local and remote tables in any combination.

Syntax

SELECT select_clausefrom_clause 
[where_clause] 
[groupby_clause] 
[having_clause]
[{UNION [ALL | DISTINCT] | 
 {MINUS [DISTINCT] | EXCEPT [DISTINCT]} | 
 INTERSECT [DISTINCT]} select_statement]
[orderby_clause]
[limit_clause]

where:

select_clause

specifies the columns from which results are to be returned by the query. See Select Clause for a complete explanation.

from_clause

specifies one or more tables on which the other clauses in the query operate. See From Clause for a complete explanation.

where_clause

is optional and restricts the results that are returned by the query. See Where Clause for a complete explanation.

groupby_clause

is optional and allows query results to be aggregated in terms of groups. See Group By Clause for a complete explanation.

having_clause

is optional and specifies conditions for groups of rows (for example, display only the departments that have salaries totaling more than $200,000). See Having Clause for a complete explanation.

UNION

is an optional operator that combines the results of the left and right Select statements into a single result. See Union Operator for a complete explanation.

INTERSECT

is an optional operator that returns a single result by keeping any distinct values from the results of the left and right Select statements. See Intersect Operator for a complete explanation.

EXCEPT | MINUS

are synonymous optional operators that return a single result by taking the results of the left Select statement and removing the results of the right Select statement. See Except and Minus Operators for a complete explanation.

orderby_clause

is optional and sorts the results that are returned by the query. See Order By Clause for a complete explanation.

limit_clause

is optional and places an upper bound on the number of rows returned in the result. See Limit Clause for a complete explanation.