脚本宝典收集整理的这篇文章主要介绍了SQL学习笔记五去重，给新加字段赋值的方法，脚本宝典觉得挺不错的，现在分享给大家，也给大家做个参考。

去掉数据重复
增加两个字段
ALTER TABLE T_Employee Add FSubCompany VArchar(20);
ALTER TABLE T_Employee ADD FDepartment VARCHAR(20);

给新加的字段赋值
UPDATE T_Employee SET FSubCompany='Beijing',FDepartment='Development' where FNumber='DEV001';
UPDATE T_Employee SET FSubCompany='ShenZhen',FDepartment='Development' where FNumber='DEV002';
UPDATE T_Employee SET FSubCompany='Beijing',FDepartment='HumanResource' where FNumber='hr001';
UPDATE T_Employee SET FSubCompany='Beijing',FDepartment='HumanResource' where FNumber='HR002';
UPDATE T_Employee SET FSubCompany='Beijing',FDepartment='InfoTech' where FNumber='IT001';
UPDATE T_Employee SET FSubCompany='ShenZhen',FDepartment='InfoTech' where FNumber='IT002';
UPDATE T_Employee SET FSubCompany='Beijing',FDepartment='Sales' where FNumber='SALES001';
UPDATE T_Employee SET FSubCompany='Beijing',FDepartment='Sales' where FNumber='SALES002';
UPDATE T_Employee SET FSubCompany='ShenZhen',FDepartment='Sales' where FNumber='SALES003';

查询并去重
select distinct FDepartment From T_Employee

select distinct FDepartment,FSubCompany from T_Employee

脚本宝典总结

以上是脚本宝典为你收集整理的SQL学习笔记五去重，给新加字段赋值的方法全部内容，希望文章能够帮你解决SQL学习笔记五去重，给新加字段赋值的方法所遇到的问题。

如果觉得脚本宝典网站内容还不错，欢迎将脚本宝典推荐好友。

本图文内容来源于网友网络收集整理提供，作为学习参考使用，版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ：384754419，请注明来意。