Interval Usage Remarks See Also Interval The family of data types representing time and date intervals. The resulting types of the INTERVAL operator. Warning You can’t use...
Global Standards OPC UA Modbus TCP Modbus Plus EtherNet/IP Global Standards OPC UA OPC is an interoperability standard for safe and reliable data exchange in the field ...
Conditional functions if Ternary operator multiIf Using conditional results directly NULL values in conditionals Conditional functions if Controls conditional branching....
集合的多结果集(ResultSet) 集合的多结果集(ResultSet) 像关联元素那样,我们可以通过执行存储过程实现,它会执行两个查询并返回两个结果集,一个是博客的结果集,另一个是文章的结果集: SELECT * FROM BLOG WHERE ID = #{id} SELECT * FROM POST WHERE BLOG...