QUEL Reference Guide > QUEL Reference Guide > Embedded QUEL > Transactions > Defining Transactions
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Defining Transactions
One or more QUEL statements enclosed within a begin transaction-end transaction block constitutes a multi-query transaction (MQT). Any QUEL statement not within a begin transaction-end transaction block is a single-query transaction (SQT).
MQTs guarantee the atomic execution of a group of QUEL statements. Within MQTs you can declaring savepoints, which enable you to partially undo the effects of a transaction without aborting the transaction.
The following QUEL statements must not appear within an MQT:
• begin transaction
• end transaction
• set lockmode
Last modified date: 01/30/2023