Difference between revisions of "SYNCNUM()"
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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. | 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. | ||
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Revision as of 11:12, 5 October 2010
Purpose
Return the unique sequence number assigned to a row from the specified table
Syntax
SYNCNUM
See Also
INSERT, Optimizing Indexes using SYNCNUM, PSEUDO COLUMNS, 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.
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, Recital Server