select * from 表名 order by id(主键) desc limit 10
SELECT * FROM gold_value.chow_tai_fook order by id desc limit 10;
返回结果 :
二、Sql 查询最新十条数据并按时间排序
SELECT * FROM (select * from 表名 order by id desc limit 10) tempTable ORDER BY id(排序字段,可以时id或时间等等)
SELECT * FROM (SELECT * FROM gold_value.chow_tai_fook order by id desc limit 10) tempTable ORDER BY Date;
返回结果 :
三、Sql 查询最新一条数据
这个在Mysql中不好使
select top 1 * from tablename order by id desc
Mysql用这个
select * from 表名 order by id(主键) desc limit 1
SELECT * FROM gold_value.chow_tai_fook order by id desc LIMIT 1;
返回结果 :
一、Sql 查询最新十条数据select * from 表名 order by id(主键) desc limit 10示例:SELECT * FROM gold_value.chow_tai_fook order by id desc limit 10;返回结果 :二、Sql 查询最新十条数据并按时间排序SELECT * FROM (select * from 表名 order by id desc limit 10) tempTable ORDER BY id(排序字段
select m, n
from (
select row_number () over (partition by m order by n desc) rn,--以m分组,分组内以n倒序排列求每组中各自的序号
from table
where ...
where w.rn <=10;...
select * from (
select *,row_number() over(PARTITION by c_prov order by c_publish_date) as rowid
from spiderdata_virus_prov_status
) a where rowid<=10
ORACLE-
SQL
:
如: select * from ( select * from t_table a where a.tpye=? order by a.time desc ) where rownum=1;
MY
SQL
-
SQL
:
如: select * from t_table a where a.type=? ...
需求:
一条
SQL
语句从多个
数据库
查询
出相关联的结果,输出到客户端
调查:spring框架可以配置多
数据
源;
sql
也可以将多个
数据库
附加到一个主
数据库
下
解决办法:用ATTACH DATABASE语句将多个库添加到主库下,实现功能
ATTACH DATABASE 'DatabaseName' As 'Alias-Name';
ATTACH DATABASE 'C:\Users\Administrator\Desktop\
sql
ite_data.sq3' As 'sd';
以上所述是小编给大家介绍的
一条
SQL
语句
查询
多个
数据库
,希望对大家有所帮助,如果大家有任何疑问请
python通过pip安装torch错误及解决办法ERROR: Could not find a version that satisfies the requirement torch
53150