Mysql Kompakt

Datenbank erstellen

• create database my_db;

In Datenbank wechseln

• use my_db;

Tabelle erstellen

• create table my_table (kw int(4), tests int(16), labor int(16) , postiv int(16), prozent float);

Beschreibung der Tabelle anzeigen

• desc my_table;

Werte in Tabelle einfügen

• insert into my_table values(11,127457,114,7582,5.95);
• insert into my_table values(12,348619,152,23820,6.83);
• insert into my_table values(13,361515,151,31414,8.69);
• insert into my_table values(14,408348,200,36885,9.3);

Wert in einer Reihe ändern

• update my_table set labor=154 where kw=14;

Alle Werte einer Tabelle anzeigen

• select * from my_table;

Alle Werte in einer Tabelle löschen

• truncate table my_table;

Tabelle aus CSV Datei füllen

Beispiel CSV Datei

• cat /var/lib/mysql-files/my.csv

 
kw,tests,labor,postiv,prozent
11,127457,114,7582,5.95
12,348619,152,23820,6.83
13,361515,151,31414,8.69
14,408348,154,36885,9.03
15,380197,164,30791,8.10
16,331902,168,22082,6.65
17,363890,178,18083,4.97
18,326788,175,12608,3.86
19,403875,182,10755,2.66
20,432666,183,7233,1.67
21,353467,179,5218,1.48
22,405269,178,4310,1.06
23,340986,176,3208,0.94
24,326645,172,2816,0.86
25,387484,175,5309,1.37
26,467004,180,6374,1.36
27,505518,150,3080,0.61
28,509298,177,2989,0.59
29,537334,173,3480,0.65
30,569868,176,4462,0.78
31,573802,161,5551,0.97

• load data infile "/var/lib/mysql-files/my.csv" into table my_table fields terminated by ',' lines terminated by '\n' ignore 1 rows;

Tabelle löschen

• drop table my_table;

Spalte hinzufügen

• alter table my_table add column test_p_1000 int(16);

Spalte entfernen

• alter table my_table drop column test_p_1000

Select mit Bedingung

• select * from my_table where tests > 500000;

Ausgabe nur gewisser Werte

• select kw,prozent from my_table where tests > 500000;

Order by

• select * from my_table where tests > 500000 order by labor;

Sichern in CSV Datei

• select * into outfile "/var/lib/mysql-files/backup.csv" fields terminated by ',' enclosed by '"' lines terminated by '\n' from my_table;

Backup einer Datenbank

• mysqldump my_db > my_db.sql

Restore einer Datenbank

• mysql my_db < my_db.sql

Reihe löschen

• delete from my_table where kw=11;

Letzer Wert anzeigen

• select * from my_table order by KW desc limit 1;

Benutzer angelegen

• create user 'tuxman'@'localhost' identified by 'Suxer-88';

Benutzer Rechte gewähren

• grant all privileges on my_db.* to 'tuxman'@'localhost' ;
• flush privileges;