vb.net 正則表達式 取 固定格式的字符: 原始字符串:strSqlTmp="select * from A_TEST where a_data = '@1@' and b_link = @2@" 当中@包围的是sql文的条件字段, 须要将条件字段取出.单独处理 Dim mc As MatchCollection = Regex.Matches(strSqlTmp, "@([0-9]*? )@") For i As Integer = 0 To mc.Count
首先建一张测试表: create table DIM_IA_TEST5 ( NAME ), OTHERNAME ), NUM NUMBER, TIMES NUMBER ) 然后插入数据,现在的表数据为: 一.重点来了,我们随机取三条数据: select * from (select * from dim_ia_test5 order by dbms_random.random) where rownum < 4 : 二.在工作中,我们有时会遇到按照每100万条导出数据到Excel(因为Exc
#!/usr/bin/env python3 # -*- coding: utf-8 -*- class A: def __init__(self): def r(): i = 1 while True: if i % 2 == 1: yield i i += 1 self._range = r() def __getitem__(self, given): l = [] start = given.start stop = given.stop step = given.step if sta