mirror of
https://github.com/postgres/postgres.git
synced 2025-10-29 22:49:41 +03:00
42 lines
1.1 KiB
Plaintext
42 lines
1.1 KiB
Plaintext
.\" This is -*-nroff-*-
|
|
.\" XXX standard disclaimer belongs here....
|
|
.\" $Header: /cvsroot/pgsql/doc/man/Attic/update.l,v 1.1.1.1 1996/08/18 22:14:28 scrappy Exp $
|
|
.TH UPDATE SQL 11/05/95 Postgres95 Postgres95
|
|
.SH NAME
|
|
update \(em replace values of attributes in a class
|
|
.SH SYNOPSIS
|
|
.nf
|
|
\fBupdate\fR classname \fBset\fR attname-1 = expression-1,
|
|
{attname-i = expression-i}
|
|
[\fBwhere\fR qual]
|
|
.fi
|
|
.SH DESCRIPTION
|
|
.BR Update
|
|
changes the values of the attributes specified in
|
|
.IR target_list
|
|
for all instances which satisfy the qualification,
|
|
.IR qual .
|
|
Only the attributes to be modified need appear in
|
|
.IR target_list .
|
|
.PP
|
|
Array references use the same syntax found in
|
|
.IR select(l).
|
|
That is, either single array elements, a range of array elements or
|
|
the entire array may be replaced with a single query.
|
|
.PP
|
|
You must have write access to the class in order to modify it, as well
|
|
as read access to any class whose values are mentioned in the target list
|
|
or qualification.
|
|
.SH EXAMPLES
|
|
.nf
|
|
--
|
|
--Give all employees who work for Smith a 10% raise
|
|
--
|
|
update emp
|
|
set sal = 1.1 * sal
|
|
where mgr = 'Smith'
|
|
.fi
|
|
.SH "SEE ALSO"
|
|
create table(l),
|
|
select(l).
|