mysql语句

去掉换行符和回车符

UPDATE table SET field = REPLACE(REPLACE(field , CHAR(10), ‘’), CHAR(13), ‘’);

ids修改为32位随机字符

update table set ids = replace(UUID(), ‘-’, ‘’) where length(ids) < 32

关联修改时，若为空，则不修改

update account a set a.person_id = IFNULL((select b.ids from person b where a.person_id = b.ids ), a.person_id )

将查询到的一列数据合并成字符串

select a.id 序号, a.name 姓名, GROUP_CONCAT(b.account separator ‘;’) 账号
from person a, account b
where 1 = 1
and a.ids = b.person_id
GROUP BY a.ids;

将多列数据合并成一行多列

select a.ids as bcids, a.cph, a.bch, a.sjdh,
MAX(case sxbbs WHEN ‘0’ THEN b.ids ELSE null END) as sbxlids,
MAX(case sxbbs WHEN ‘0’ THEN c.fcsj ELSE null END) as sbfcsj,
MAX(case sxbbs WHEN ‘1’ THEN b.ids ELSE null END) as xbxlids,
MAX(case sxbbs WHEN ‘1’ THEN c.fcsj ELSE null END) as xbfcsj
from bcxx a, xlxx b, zdxx c

生成随机姓名

update xxx set name = concat(substring(‘赵钱孙李周吴郑王冯陈诸卫蒋沈韩杨朱秦尤许何吕施张孔曹严华金魏陶姜戚谢邹喻柏水窦章云苏潘葛奚范彭郎鲁韦昌马苗凤花方俞任袁柳酆鲍史唐费廉岑薛雷贺倪汤滕殷罗毕郝邬安常乐于时傅皮齐康伍余元卜顾孟平黄和穆萧尹姚邵堪汪祁毛禹狄米贝明臧计伏成戴谈宋茅庞熊纪舒屈项祝董粱杜阮蓝闵席季麻强贾路娄危江童颜郭梅盛林刁钟徐邱骆高夏蔡田樊胡凌霍虞万支柯咎管卢莫经房裘干解应宗丁宣贲邓郁单杭洪包诸左石崔吉钮龚’,floor(1+190rand()),1),substring(‘明国华建文平志伟东海强晓生光林小民永杰军金健一忠洪江福祥中正振勇耀春大宁亮宇兴宝少剑云学仁涛瑞飞鹏安亚泽世汉达卫利胜敏群波成荣新峰刚家龙德庆斌辉良玉俊立浩天宏子松克清长嘉红山贤阳乐锋智青跃元武广思雄锦威启昌铭维义宗英凯鸿森超坚旭政传康继翔栋仲权奇礼楠炜友年震鑫雷兵万星骏伦绍麟雨行才希彦兆贵源有景升惠臣慧开章润高佳虎根远力进泉茂毅富博霖顺信凡豪树和恩向道川彬柏磊敬书鸣芳培全炳基冠晖京欣廷哲保秋君劲轩帆若连勋祖锡吉崇钧田石奕发洲彪钢运伯满庭申湘皓承梓雪孟其潮冰怀鲁裕翰征谦航士尧标洁城寿枫革纯风化逸腾岳银鹤琳显焕来心凤睿勤延凌昊西羽百捷定琦圣佩麒虹如靖日咏会久昕黎桂玮燕可越彤雁孝宪萌颖艺夏桐月瑜沛诚夫声冬奎扬双坤镇楚水铁喜之迪泰方同滨邦先聪朝善非恒晋汝丹为晨乃秀岩辰洋然厚灿卓杨钰兰怡灵淇美琪亦晶舒菁真涵爽雅爱依静棋宜男蔚芝菲露娜珊雯淑曼萍珠诗璇琴素梅玲蕾艳紫珍丽仪梦倩伊茜妍碧芬儿岚婷菊妮媛莲娟一’,floor(1+400rand()),1),substring(‘明国华建文平志伟东海强晓生光林小民永杰军金健一忠洪江福祥中正振勇耀春大宁亮宇兴宝少剑云学仁涛瑞飞鹏安亚泽世汉达卫利胜敏群波成荣新峰刚家龙德庆斌辉良玉俊立浩天宏子松克清长嘉红山贤阳乐锋智青跃元武广思雄锦威启昌铭维义宗英凯鸿森超坚旭政传康继翔栋仲权奇礼楠炜友年震鑫雷兵万星骏伦绍麟雨行才希彦兆贵源有景升惠臣慧开章润高佳虎根远力进泉茂毅富博霖顺信凡豪树和恩向道川彬柏磊敬书鸣芳培全炳基冠晖京欣廷哲保秋君劲轩帆若连勋祖锡吉崇钧田石奕发洲彪钢运伯满庭申湘皓承梓雪孟其潮冰怀鲁裕翰征谦航士尧标洁城寿枫革纯风化逸腾岳银鹤琳显焕来心凤睿勤延凌昊西羽百捷定琦圣佩麒虹如靖日咏会久昕黎桂玮燕可越彤雁孝宪萌颖艺夏桐月瑜沛诚夫声冬奎扬双坤镇楚水铁喜之迪泰方同滨邦先聪朝善非恒晋汝丹为晨乃秀岩辰洋然厚灿卓杨钰兰怡灵淇美琪亦晶舒菁真涵爽雅爱依静棋宜男蔚芝菲露娜珊雯淑曼萍珠诗璇琴素梅玲蕾艳紫珍丽仪梦倩伊茜妍碧芬儿岚婷菊妮媛莲娟一’,floor(1+400*rand()),1))

转自：https://blog.youkuaiyun.com/gjq246/article/details/72771939

生成随机手机号

update xxx set mobile = concat(‘1’,substring(cast(3 + (rand() * 10) % 7 AS char(50)), 1, 1),right(left(trim(cast(rand() AS char(50))), 11), 9));

转自：https://blog.youkuaiyun.com/leshami/article/details/84348477

Mysql导入数据量较大的SQL文件

转：https://blog.youkuaiyun.com/weistin/article/details/80258548

ERROR 1010 (HY000): Error dropping database (can’t rmdir ‘.\qpweb’, errno: 41) 删库失败问题的解决

转：https://blog.youkuaiyun.com/defonds/article/details/45113783

Mysql查询用逗号分隔的字段-字符串函数FIND_IN_SET()，以及此函数与in()函数的区别

转：https://www.cnblogs.com/zxmceshi/p/5479892.html
转：https://www.cnblogs.com/duanrantao/p/9358409.html
##查询列表中重复行及数量
select a.* from people a where a.id_card in
(SELECT id_card as con FROM people group by id_card having count(id_card)>1)
order by a.id_card;