Files
obsidian/WS2324/Datenbank/Unterricht/04. DDL und DML (24.10.2023)/Vorlesungsbeispiel.txt

37 lines
855 B
Plaintext

describeINSERT INTO test VALUE kunde;
DROP TABLE test;
CREATE TABLE test(
id INTEGER Primary key,
begruessung CHAR(20)
);
describe test;
INSERT INTO test VALUES (1, 'Hallo ');
SELECT * FROM test;1
S (2, 'Du da ');
SELECT * FROM test;
UPDATE test
SET begruessung = 'Sehr geehrte'
WHERE Id=2;
Select * from test;
ALTER TABLE test
modify begruessung CHAR(30);
describe test;
UPDATE test
SET begruessung = 'Sehr geehrte Damen und Herren'
WHERE Id=2;
SELECT * FROM test;
DELETE FROM test
WHERE Id=1;
SELECT * FROM test;
-- -----------------------------------
DROP TABLE test;
CREATE TABLE test(
id INTEGER Primary key,
begruessung CHAR(20) NOT NULL
);
INSERT INTO test (id) VALUES (1);
INSERT INTO test (id, begruessung) VALUES (1, NULL);
INSERT INTO test VALUES (1, NULL);
INSERT INTO test ( begruessung, id) VALUES ('hallo', 1);
select * from test