百度试题 结果1 题目SELECT SUBSTRING_INDEX(‘Welcome to China’, ‘to’, -1)的结果是( ) A. Welcome B. to C. China D. Welcome to 相关知识点: 试题来源: 解析 C China 反馈 收藏
select * from lackgoodsapplybillbase a inner join lackgoodsapplybillinfo b on a.`vLACKGOODSAPPLY_ID`=b.`vLACKGOODSAPPLY_ID` where b.`vPART_ID` not in (select SUBSTRING_INDEX(vPART_ID, '/', 1) from materbaseinfo) order by a.dOPERATE_DATE DESC...
select substring_index(profile,',',-1) as gender, count(device_id) from user_submit group by gender; 先拿substring_index将性别分出来,再计算每个性别对应的设备账号,再用性别分组就ok_牛客网_牛客在手,offer不愁
select substring_index(subject_set,',',1) as subject_id1, count(distinct id) as cnt from comment_detail where subject_set regexp'^1002|,1002' group by subject_id1 order by subject_id1 05-06 11:50 北京邮电大学 移动通讯工程师
select * from lackgoodsapplybillbase a inner join lackgoodsapplybillinfo b on a.`vLACKGOODSAPPLY_ID`=b.`vLACKGOODSAPPLY_ID` where b.`vPART_ID` not in (select SUBSTRING_INDEX(vPART_ID, '/', 1) from materbaseinfo) order by a.dOPERATE_DATE DESC...
SELECTSUBSTRING_INDEX(user_info,',',1)ASuser_name,SUBSTRING_INDEX(SUBSTRING_INDEX(user_info,',',2),',',-1)ASuser_age,SUBSTRING_INDEX(user_info,',',-1)ASuser_genderFROMusers; 1. 2. 3. 4. 5. 6. 这里我们提取了用户的姓名、年龄和性别。
4. 字符串截取:substring_index(str,delim,count) 4.1 截取第二个 ‘.’ 之前的所有字符。 mysql> select substring_index(‘www.sqlstudy.com.cn’, ‘.’, 2); +———+ | substring_index(‘www.sqlstudy.com.cn’, ‘.’, 2) | +———+ | www.sqlstudy |...
我们注意到在函数 substring(str,pos, len)中, pos 可以是负值,但 len 不能取负值。 4. 字符串截取:substring_index(str,delim,count) 4.1 截取第二个'.' 之前的所有字符。 mysql> select substring_index('www.sqlstudy.com.cn','.',2);
SELECT SUBSTRING_INDEX(‘Welcome toA.WelcomeB.toC.ChinaD.Welcome to的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线题库手机刷题,以提高学习效率,是学习的生产力工具
使用CAST()函数将数字转换为字符串，然后使用SUBSTRING_INDEX()函数截取指定位数的子字符串：SELECT ...