mysql 单表操作

单表插入

insert into tablename values(values_list);

insert into tablename(column_list) values(values_list);

insert into tablename(column_list) values(values_list1),(values_list2);

insert into tablename(column_list) select (column_list) from tablenmae where(cond);

单表数据更新：

update tablename set column1=value1，column2=value2 where (cond)

单表数据的删除：

delete from tablename where(cond);

truncate table tablename;  删除一个表，并重新创建一个表

单表记录查询：

select select_expr from tablename [where cond]

[Group by column [AEC|DEC]]

[having cond][order by column [AEC|DEC]]    过滤分组条件

[limit ]

select distinct column from tablename;

select * from tablename where colummn is NULL;