Oracle sql语句把字段中的某个字符去掉

Posted 2023-05-06

参考技术A

1、创建测试表，

create table test_date2(id int , v_date varchar(20));

2、插入测试数据

insert into test_date2 values(1,'2014-01');

insert into test_date2 values(2,'2014-02');

insert into test_date2 values(3,'2014-03');

insert into test_date2 values(4,'2014-04');

insert into test_date2 values(5,'2014-05');

insert into test_date2 values(6,'2014-06');

commit;

3、查询表中数据，可以发现字段中带有字符，'-'，select t.* from test_date2 t;

4、编写sql，把字段中的字符‘-’去掉; select t*, replace(v_date,'-','') v_date2 from test_date2;

sql语句把字段中的某个字符去掉

 sql语句把字段中的某个字符去掉

update Notifications set Accessory=replace(Cast(Accessory as varchar(8000)),‘http://demo.m-school.net‘,‘‘)

 例如：

update Notifications set Accessory=replace(Cast(Accessory as varchar(8000)),‘http://192.168.2.180‘,‘‘)
update Notifications set Accessory=replace(Cast(Accessory as varchar(8000)),‘http://zpzx.m-school.net‘,‘‘)
update Homeworks set Accessory=replace(Cast(Accessory as varchar(8000)),‘http://192.168.2.180‘,‘‘)
update Homeworks set Accessory=replace(Cast(Accessory as varchar(8000)),‘http://zpzx.m-school.net‘,‘‘)
update OpenCourses set Attachment=replace(Cast(Attachment as varchar(8000)),‘http://192.168.2.180‘,‘‘)
update OpenCourses set Attachment=replace(Cast(Attachment as varchar(8000)),‘http://zpzx.m-school.net‘,‘‘)
update OpenCourses set Audio=replace(Cast(Audio as varchar(8000)),‘http://192.168.2.180‘,‘‘)
update OpenCourses set Audio=replace(Cast(Audio as varchar(8000)),‘http://zpzx.m-school.net‘,‘‘)
update ListenCourses set Attachment=replace(Cast(Attachment as varchar(8000)),‘http://192.168.2.180‘,‘‘)
update ListenCourses set Attachment=replace(Cast(Attachment as varchar(8000)),‘http://zpzx.m-school.net‘,‘‘)
update ListenCourses set Audio=replace(Cast(Audio as varchar(8000)),‘http://192.168.2.180‘,‘‘)
update ListenCourses set Audio=replace(Cast(Audio as varchar(8000)),‘http://zpzx.m-school.net‘,‘‘)

老师，学生，家长头像：

update Sys_User set Portrait=replace(Portrait,‘http://zpzx.m-school.net‘,‘‘)
update Students set Portrait=replace(Portrait,‘http://zpzx.m-school.net‘,‘‘)
update Parents set Portrait=replace(Portrait,‘http://zpzx.m-school.net‘,‘‘)