MySQL相關

1.進入安裝目錄

cd E:\ZYXDocument\Software\mariadb-10.0.20-win32\bin

2.安裝mysql服務
將E:\ZYXDocument\Software\mariadb-10.0.20-win32\my.ini 放入 C:\Windows中

mysqld --install mysql --defaults-file="E:\ZYXDocument\Software\mariadb-10.0.20-win32\my.ini"

mysqld --install mysql --defaults-file="E:/ZYXDocument/Software/mysql-5.6.25/my.ini"

mysqld --defaults-file="E:/ZYXDocument/Software/mysql-5.7.11/my.ini" --initialize-insecure

mysqld --install mysql --defaults-file="E:/ZYXDocument/Software/mysql-5.7.11/my.ini"

Host
User

3.啟動mysql資料庫服務

net start mysql

4.停止mysql資料庫服務

net stop mysql

5.刪除mysql資料庫服務
mysqld remove mysql

6、修改mysql資料庫的root密碼（初始為空）

方法1： 用SET PASSWORD命令

    mysql -u root

    mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('gis');

方法2：用mysqladmin

    mysqladmin -u root password "gis"

    如果root已經設置過密碼，採用如下方法

    mysqladmin -u root password oldpass "gis"

方法3： 用UPDATE直接編輯user表

    mysql -u root

    mysql> use mysql;

    mysql> UPDATE user SET Password = PASSWORD('gis') WHERE user = 'root';

    mysql> FLUSH PRIVILEGES;

在丟失root密碼的時候，可以這樣

    mysqld_safe --skip-grant-tables&

    mysql -u root mysql

    mysql> UPDATE user SET password=PASSWORD("gis") WHERE user='root';

    mysql> FLUSH PRIVILEGES;

7、設置root許可權

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'gis';

SET GLOBAL max_allowed_packet = 2*1024*1024*10;

DELETE p.*
FROM st_rsvr_r p
LEFT JOIN st_stbprp_b pp
ON p.stcd = pp.stcd
WHERE pp.stnm IS NULL
COMMIT;

SET PASSWORD FOR 'root'@'%' = PASSWORD('gis');

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空間查詢相關操作

ALTER TABLE test_gis_station_hb ADD shape GEOMETRY AFTER lttd;

UPDATE test_gis_station_hb SET shape=GEOMFROMTEXT(CONCAT('POINT(', CAST(lgtd AS CHAR(20)), ' ', CAST(lttd AS CHAR(20)) ,')'))

SELECT ASTEXT(shape) shape, stcd FROM test_gis_station_hb

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MYSQL查詢重覆記錄的方法很多，下麵就為您介紹幾種最常用的MYSQL查詢重覆記錄的方法，希望對您學習MYSQL查詢重覆記錄方面能有所幫助。

1、查找表中多餘的重覆記錄，重覆記錄是根據單個欄位（peopleId）來判斷

select * from people  
where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1)

 
2、刪除表中多餘的重覆記錄，重覆記錄是根據單個欄位（peopleId）來判斷，只留有rowid最小的記錄

delete from people  
where peopleId in (select peopleId from people group by peopleId   having count(peopleId) > 1)  
and rowid not in (select min(rowid) from people group by peopleId having count(peopleId )>1)  

3、查找表中多餘的重覆記錄（多個欄位）

select * from vitae a  
where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1)  

4、刪除表中多餘的重覆記錄（多個欄位），只留有rowid最小的記錄

delete from vitae a  
where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1)  
and rowid not in (select min(rowid) from vitae group by peopleId,seq having count(*)>1)  

5、查找表中多餘的重覆記錄（多個欄位），不包含rowid最小的記錄

select * from vitae a  
where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1)  
and rowid not in (select min(rowid) from vitae group by peopleId,seq having count(*)>1) 

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