Screenshots/Beispiele 16.11.2023

20231116/dbms-13.txt

+testdb=> INSERT INTO tier SET name = 'Pluto', tierart = 'Hund', id = 31;
+FEHLER:  Syntaxfehler bei »SET«
+ZEILE 1: INSERT INTO tier SET name = 'Pluto', tierart = 'Hund', id = ...
+                          ^
+testdb=> INSERT INTO tier ( id, name, tierart ) VALUES ( 31, 'Pluto', 'Hund' );
+INSERT 0 1
+testdb=> SELECT * FROM tier;                                                                               name              |            tierart             | id
+--------------------------------+--------------------------------+----
+ Esmeralda                      | Spinne                         |  1
+ Timmy                          | Hund                           |  2
+ Dio                            | Katze                          |  3
+ Tusnelda                       | Spinne                         |  4
+ Ragnar                         | Katze                          |
+ Putzi                          | Ratte                          |
+ Micky                          | Mouse                          | 30
+ Pluto                          | Hund                           | 31
+(8 Zeilen)
+
+testdb=>

20231116/dbms-14.txt

+testdb=> SELECT * FROM tier;                                                                               name              |            tierart             | id
+--------------------------------+--------------------------------+----
+ Esmeralda                      | Spinne                         |  1
+ Timmy                          | Hund                           |  2
+ Dio                            | Katze                          |  3
+ Tusnelda                       | Spinne                         |  4
+ Ragnar                         | Katze                          |
+ Putzi                          | Ratte                          |
+ Micky                          | Mouse                          | 30
+ Pluto                          | Hund                           | 31
+(8 Zeilen)
+
+testdb=> DELETE FROM tier WHERE id >= 30;
+DELETE 2
+testdb=> SELECT * FROM tier;
+              name              |            tierart             | id
+--------------------------------+--------------------------------+----
+ Esmeralda                      | Spinne                         |  1
+ Timmy                          | Hund                           |  2
+ Dio                            | Katze                          |  3
+ Tusnelda                       | Spinne                         |  4
+ Ragnar                         | Katze                          |
+ Putzi                          | Ratte                          |
+(6 Zeilen)
+
+testdb=>

20231116/dbms-15.txt

+testdb=> SELECT * FROM tier WHERE tierart = 'Katze';
+              name              |            tierart             | id
+--------------------------------+--------------------------------+----
+ Dio                            | Katze                          |  3
+ Ragnar                         | Katze                          |
+(2 Zeilen)
+
+testdb=> SELECT * FROM tier WHERE tierart = '%atze';
+ name | tierart | id
+------+---------+----
+(0 Zeilen)
+
+testdb=> SELECT * FROM tier WHERE tierart = '%at%';
+ name | tierart | id
+------+---------+----
+(0 Zeilen)
+
+testdb=> SELECT * FROM tier WHERE tierart LIKE '%atze';
+ name | tierart | id
+------+---------+----
+(0 Zeilen)
+
+testdb=> SELECT * FROM tier WHERE tierart LIKE '%at%';
+              name              |            tierart             | id
+--------------------------------+--------------------------------+----
+ Dio                            | Katze                          |  3
+ Ragnar                         | Katze                          |
+ Putzi                          | Ratte                          |
+(3 Zeilen)
+
+testdb=> SELECT * FROM tier WHERE tierart LIKE '%%atze';
+ name | tierart | id
+------+---------+----
+(0 Zeilen)
+
+testdb=> SELECT * FROM tier WHERE tierart LIKE '%%atze%';
+              name              |            tierart             | id
+--------------------------------+--------------------------------+----
+ Dio                            | Katze                          |  3
+ Ragnar                         | Katze                          |
+(2 Zeilen)
+
+testdb=>

20231116/dbms-16.txt

+testdb=> SELECT COUNT(*) FROM tier WHERE tierart = 'Katze';
+ count
+-------
+     2
+(1 Zeile)
+
+testdb=> SELECT COUNT(id) FROM tier WHERE tierart = 'Katze';
+ count
+-------
+     1
+(1 Zeile)
+
+testdb=>

20231116/dbms-17.txt

+testdb=> SELECT COUNT(*) FROM tier GROUP BY tierart;
+ count
+-------
+     2
+     1
+     1
+     2
+(4 Zeilen)
+
+testdb=> SELECT *, COUNT(*) FROM tier GROUP BY tierart;
+FEHLER:  Spalte »tier.name« muss in der GROUP-BY-Klausel erscheinen oder in einer Aggregatfunktion verwendet werden
+ZEILE 1: SELECT *, COUNT(*) FROM tier GROUP BY tierart;
+                ^
+testdb=> SELECT tierart, COUNT(*) FROM tier GROUP BY tierart;
+            tierart             | count
+--------------------------------+-------
+ Spinne                         |     2
+ Hund                           |     1
+ Ratte                          |     1
+ Katze                          |     2
+(4 Zeilen)
+
+testdb=>

20231116/normalformen-01.txt

+testdb=> CREATE TABLE cd ( cd_id INTEGER, albumtitel TEXT, interpret TEXT, gruendungsjahr INTEGER, erscheinungsjahr INTEGER );
+CREATE TABLE
+testdb=> CREATE TABLE lied ( cd_id INTEGER, track integer, titel TEXT );
+CREATE TABLE
+testdb=> INSERT INTO TAB
+
+testdb=> INSERT INTO cd ( cd_id, albumtitel, interpret, gruendungsjahr, erscheinungsjahr ) VALUES ( 4711, 'Not That Kind', 'Anastacia', 1999, 2000 ), ( 4712, 'Wish You Were Here', 'Pink Floyd', 1965, 1975 ), ( 4713, 'Freak of Nature', 'Anastacia', 1999, 2001 );
+INSERT 0 3
+testdb=> INSERT INTO lied ( cd_id, track, titel ) VALUES ( 4711, 1, 'Not That Kind' ), (4711, 2, 'I''m Otta Love' ), ( 4711, 3, 'Cowboys & Kisses' ), ( 4712, 1, 'Shine On You Crazy Diamond' ), ( 4713, 1, 'Paid my Dues' );
+INSERT 0 5
+testdb=>