常用SQL语句集锦

MySQL适用

MS SQLServer适用

Oracle适用

MySQL适用

1、如图所示，根据Coord字段内容填充X/Y字段，并调整Coord字段格式（Coord字段原为[Latitude,Longitude]格式，需要将其调整为[Longitude,Latitude]格式）

UPDATE test.e_temple t SET t.X = RIGHT(t.Coord, 10);
UPDATE test.e_temple t SET t.Y = LEFT(t.Coord, 9);
UPDATE test.e_temple t SET t.Coord = CONCAT(RIGHT(t.Coord, 10),',',LEFT(t.Coord, 9));

2、解决MySQL远程连接1130错误问题

GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION; -- 授权任何主机连接MySQL服务器

GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION; --授权IP为192.168.1.3的主机连接MYSQL服务器

3、根据原表创建新表 

CREATE TABLE t_g_configitem_py LIKE t_g_configitem;   
INSERT INTO t_g_configitem_py SELECT * FROM t_g_configitem; 

或者

CREATE TABLE t_g_configitem_bj AS ( SELECT * FROM t_g_configitem );

4、删除表里所有数据

DELETE FROM scwater.t_b_pipeleakage;

或者

TRUNCATE scwater.t_b_pipeleakage;--删除数据并使得自增ID恢复从1开始

5、关联更新 

UPDATE scwater.t_b_pipeleakage2 AS a SET a.RouteID = (SELECT b.RouteID FROM scwater.td_b_route AS b WHERE a.DefectCode = b.RouteName);

6、字符串连接并更新

UPDATE scwater.t_b_pipeleakage2 AS a SET a.DefectCode = CONCAT(a.DefectType, a.DefectLevel);

MS SQLServer适用

1、查询数据库中所有表的表名称

USE UrbanVA
GO
SELECT name FROM SYSOBJECTS WHERE xtype='U'

USE UrbanVA
GO
SELECT name FROM sys.tables

2、查询表中所有列的名称

USE UrbanVA
GO
SELECT name FROM syscolumns WHERE id=object_id('Sdzzd_P') ORDER BY colorder

Oracle适用

1、删除表中的字段

--一次删除一个字段
alter table mms.tcmmspoint drop column latitude;
--一次删除一个字段
alter table mms.tcmmspoint drop (longitude); 
--一次删除多个字段
alter table mms.tcmmspoint drop (longitude, latitude); 

2、向表中添加字段

--添加字段
alter table mms.tcmmspoint add (Longitude Number,Latitude Number);
--添加字段，并指定默认值
alter table mms.tcmmsadvtlabel add(deleteFlag number(38) default 0);

3、关联更新（用b表中的字段更新a表中的字段值）

update mms.tcmmspoint a set a.latitude = (select b.y from mms.mmspoint b WHERE b.pointid = a.pointid);

4、恢复drop操作删除的表

--查询被删除的表
select * from recyclebin;
--恢复tcMMSPointLink 表
flashback table tcMMSPointLink to before drop;

5、将a表的查询结果插入到b表

insert into mms.tcmmspointbek select * from mms.tcmmspoint t where t.routeid = 51 and t.pointid >= 232244 and t.pointid <= 232258;

6、a表和b表都存在某字段，查找存在于a表但不存在于b表的字段值

select distinct(routeid) from mms.tcmmspoint
minus
select distinct(routeid) from mms.tcmmsroute;

select distinct(a.routeid) from mms.tcmmspoint a
where not exists 
(select distinct(b.routeid) from  mms.tcmmsroute b where b.routeid = a.routeid);

7、删除表

drop table mms.tcmmspointlink;

8、修改表名称

alter table mms.tcmmspointlinkex rename to tcmmspointlink;

9、查询最小值、最大值

select min(a.pointid) from mms.tcmmspoint a where a.routeid = 15;
select max(a.pointid) from mms.tcmmspoint a where a.routeid = 15;

10、统计计数

select count(*) from mms.tcmmspoint;

11、根据实景点表查询当前项目的实景是由哪几辆采集车采集的？

select distinct(substr(a.imagename, 0, 6)) from mms.tcmmspoint a;

select * from mms.tcmmsvehicleconfig a where a.vehiclecode in 
(
       select distinct(substr(b.imagename, 0, 6)) from mms.tcmmspoint b
);

12、根据实景点表查询每条Route中的最大PointID

select t.routeid, max(t.pointid) from mms.tcmmspoint t group by t.routeid;

13、清除回收站

purge recyclebin;       --清除当前用户的回收站
purge dba_recyclebin;   --清除所有用户的回收站

14、根据原有表创建新表

create table mms.tcmmspointnew as select * from mms.tcmmspoint where 1=2; --复制表结构
create table mms.tcmmspointnew as select * from mms.tcmmspoint; --复制表结构及其数据
create table mms.tcmmslabelnew as select * from mms.tcmmslabel where mms.tcmmslabel.objectname = '上水井盖';

15、删除用户（system as sysdba）

drop user mms cascade;

15、删除表空间（system as sysdba）

drop tablespace mms including contents and datafiles;

16、创建表空间（system as sysdba）

CREATE TABLESPACE "MMS" 
    LOGGING 
    DATAFILE 'D:appAdministratororadataORCLMMS.DBF' SIZE 200M 
    AUTOEXTEND 
    ON NEXT  102400K MAXSIZE UNLIMITED EXTENT MANAGEMENT LOCAL SEGMENT
    SPACE MANAGEMENT  AUTO ;

17、创建用户并赋权限（system as sysdba）

CREATE USER MMS PROFILE "DEFAULT"
    IDENTIFIED BY "mms" DEFAULT TABLESPACE MMS
    ACCOUNT UNLOCK;
GRANT CONNECT TO MMS;
GRANT DBA TO MMS;
GRANT ALTER ANY TABLE TO MMS;
GRANT CREATE ANY INDEX TO MMS;
GRANT CREATE ANY PROCEDURE  TO MMS;
GRANT CREATE ANY TABLE TO MMS;
GRANT CREATE ANY TRIGGER TO MMS;
GRANT DELETE ANY TABLE TO MMS;
GRANT DROP ANY INDEX TO MMS;
GRANT DROP ANY PROCEDURE TO MMS;
GRANT DROP ANY TABLE TO MMS;
GRANT DROP ANY TRIGGER TO MMS;
GRANT EXECUTE ANY PROCEDURE TO MMS; 
GRANT INSERT ANY TABLE TO MMS;
GRANT SELECT ANY TABLE TO MMS;
GRANT UPDATE ANY TABLE TO MMS;
GRANT ALTER ANY PROCEDURE TO MMS;
GRANT CREATE ANY VIEW TO MMS;

18、按时序间隔（10分钟）生成模拟数据

INSERT INTO rwdb.st_waterlogging_r(stcd,tm,z)
  SELECT 'Z38',to_date(to_char(to_date('20190218', 'yyyymmdd') + rownum / 24 / 6, 'yyyy-mm-dd HH24:MI:SS'),'yyyy-mm-dd hh24:mi:ss'), dbms_random.value(0.0,200.0)
    FROM dual
  CONNECT BY rownum <= 24 * 60 * 60 - 1;

19、解锁scott用户，并设置密码

alter user scott account unlock;
alter user scott identified by scott;

 20、在原有时间增加一小时、一分钟、一秒钟

update scdata.tl_um_patrolpos t set t.updatetime = t.updatetime - 1/(24);
update scdata.tl_um_patrolpos t set t.updatetime = t.updatetime - 1/(24*60);
update scdata.tl_um_patrolpos t set t.updatetime = t.updatetime - 1/(24*60*60);

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