tristaZero opened a new issue #9129: URL: https://github.com/apache/shardingsphere/issues/9129
### Introduction [MERGE](https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/MERGE.html#GUID-5692CCB7-24D9-4C0E-81A7-A22436DC968F) SQL is made up of many [basic elements](https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/Expressions.html#GUID-E7A5363C-AEE9-4809-99C1-1A9C6E3AE017) or [keywords](https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/Oracle-SQL-Reserved-Words-and-Keywords.html#GUID-6A07BB21-AD82-4B47-80FA-9B1141CC23C2). Hence it is a good thread to help us fix the vague definitions of these basic elements which will compose other complex SQL definition. ### Task - Work out the vague definition of basic elements - Proofread `MERGE` definition - Add test for `MERGE` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
