Revision as of 12:38, 13 March 2009

SYNCNUM

Class

Pseudo Columns

Purpose

Return the unique sequence number assigned to a row from the specified table

Syntax

SYNCNUM

See Also

PSEUDO COLUMNS, INSERT, SELECT, UPDATE

Description

A Pseudo Column behaves like a table column, but is not actually stored in the table. You can select from Pseudo Columns, but they cannot be updated. Pseudo Columns provide extra information about a SELECT row set.

The SYNCNUM pseudo column will return the unique sequence number assigned to a row from the specified table. Each new row inserted into a table will be assigned a unique sequence number for that table. Even if the row is deleted later or if all the rows are deleted from the table, that number will not be issued again.

Note: The SYNCNUM pseudo column for existing Recital 9 tables can be populated using the dbconvert utility and the CONVERT command.

Example

// Display all overdue accounts with 15% commission in
// Sorted "name" and "paid date" order with the unique row sequence number.
EXEC SQL
SELECT SYNCNUM, name, address, balance, cost*1.15
FROM accounts
WHERE paid_date < date()
ORDER BY name, paid_date;

Products

Recital Database Server, Recital Mirage Server, Recital Terminal Developer