摘要:
MERGE INTO target_tableUSING source_table ON (join_condition)WHEN MATCHED THEN UPDATE SET … [WHERE …] [DELETE … WHERE …]WHEN NOT MATCHED THEN INSERT ( 阅读全文
摘要:
The Revision Control System (RCS) manages multiple revisions of files. RCS automates the storing, retrieval, logging, identification, and merging of r 阅读全文