Mysql的常用语句

-- 创建表
create table tableName(
    id int primary key,
   name varchar(20)
)

-- 查询
select * from tableName

-- 查询并排序(降序，升序是asc)
select * from tableName order by desc 

-- 分组查询 (根据姓名分组)
select name,count(*) from tableName group by name

-- 分组查询 (根据姓名分组) 分组后再查询 
select name,count(*) from tableName group by name having name = "张三"

-- 模糊查询 查询姓名中含有张的
select * from tableName where name like '%张%'

-- 修改
update tableName set name = ? where id = ?

--删除
delete from tableName-- 分页查询select * from tableName limit 0,10