Mysql的增删改查语句简单实现
增加记录:
insert into tablename(...) values(...) //如果增加的记录包括所有的列,则不需要写数据列表 insert into tablename values(...)
删除记录:
delete from tablename where condition ;
修改记录:
update tablename set xx=xx , xx=xx... where condition ; alter table tablename set xx=xx , xx=xx... where condition ;
查询记录:
select (...) from tablename where condition ; select * from tablename where condition ;
删除整个表:
drop table tablename ;
添加列:
alter table tablename add column columnname columntype ... ;
删除列:
alter table tablename drop column columnname ;
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