"Joost Kraaijeveld" <[EMAIL PROTECTED]> writes:
> "select * from (select * from table_name)"
> PostgreSQL complains with
> ERROR: subquery in FROM must have an alias
> HINT: For example, FROM (SELECT ...) [AS] foo.
> Is the alias required by the ISO standard
Yes. A FROM-clause entry is defined as
<table reference> ::=
<table name> [ [ AS ] <correlation name>
[ <left paren> <derived column list> <right paren> ] ]
| <derived table> [ AS ] <correlation name>
[ <left paren> <derived column list> <right paren> ]
| <joined table>
<derived table> ::= <table subquery>
Note that the brackets show that a <correlation name> (ie, an alias)
is optional for a regular table, but not for a subquery.
regards, tom lane
---------------------------(end of broadcast)---------------------------
TIP 2: Don't 'kill -9' the postmaster
