specifies the columns from which results are to be returned by the query. See "Select" for a complete explanation.
from_clause
specifies one or more tables on which the other clauses in the query operate. See "From" 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.
