把下面的脚本放进pd的脚本运行器运行即可 '****************************************************************************** Option Explicit Dim rowsNum rowsNum = 0 '----------------------------------------------------------------------------- ' Main function
隐式转化规则 官方文档中关于隐式转化的规则是如下描述的： If one or both arguments are NULL, the result of the comparison is NULL, except for the NULL-safe equality comparison operator. For NULL NULL, the result is true. No conversion is needed. If bot
在网上查找删除重复数据保留id最小的数据，方法如下： DELETE FROM people WHERE peopleName IN ( SELECT peopleName FROM people GROUP BY peopleName HAVING count(peopleName) > 1 ) AND p
本文示例可见一斑了，主要是通过Java对SQL语句进行操作，和普通的增删改查的原理是一样的： import java.sql.*; public class Test { public static void main(String[] args) throws Exception { Class.forName("com.mysql.jdbc.Driver"); //一
