nvl:
`nvl` is a SQL function present in its vendor-specific implementation by Oracle. It takes two arguments, and returns the first argument if it's non-null, and otherwise returns the second. It's similar to the function `coalesce` in standard SQL.
`nvl` is a SQL function present in its vendor-specific implementation by Oracle. It takes two arguments, and returns the first argument if it's non-null, and otherwise returns the second. It's similar to the function `coalesce` in standard SQL.
站内导航:
特别声明:169IT网站部分信息来自互联网,如果侵犯您的权利,请及时告知,本站将立即删除！
©2012-2021,