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Reference : Supported SQL Statements and Extensions : Select
  

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Select

Purpose

Use the Select statement to fetch results from one or more tables. The Select statement 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]
[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 returns 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.
Note: Although the CreatedTime and UpdatedTime fields on custom objects map to the relational view, you cannot query against them unless you enable the fields within the Object Designer in the Oracle Service Cloud admin tool.
In this section: 
* Select Clause