mirror of
https://github.com/MariaDB/server.git
synced 2025-05-08 15:01:49 +03:00
49 lines
902 B
Plaintext
49 lines
902 B
Plaintext
DROP TABLE IF EXISTS t1;
|
|
CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
|
|
INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e'),(10000,'foobar');
|
|
INSERT INTO t1 (a,b) SELECT a, b FROM t1;
|
|
BEGIN;
|
|
UPDATE t1 SET a=a+100;
|
|
UPDATE t1 SET a=a-50, b=DEFAULT WHERE a>100;
|
|
COMMIT;
|
|
SELECT * FROM t1;
|
|
a b
|
|
10050 NULL
|
|
10050 NULL
|
|
51 NULL
|
|
51 NULL
|
|
52 NULL
|
|
52 NULL
|
|
53 NULL
|
|
53 NULL
|
|
54 NULL
|
|
54 NULL
|
|
55 NULL
|
|
55 NULL
|
|
BEGIN;
|
|
UPDATE t1 SET b = 'update' WHERE a <= 4 ORDER BY a DESC, b ASC LIMIT 3;
|
|
UPDATE t1 SET b = '';
|
|
ROLLBACK;
|
|
BEGIN;
|
|
UPDATE t1 SET b = 'update2' WHERE a <= 100;
|
|
SAVEPOINT spt1;
|
|
UPDATE t1 SET b = '';
|
|
ROLLBACK TO SAVEPOINT spt1;
|
|
UPDATE t1 SET b = 'upd' WHERE a = 10050;
|
|
COMMIT;
|
|
SELECT * FROM t1;
|
|
a b
|
|
10050 upd
|
|
10050 upd
|
|
51 update2
|
|
51 update2
|
|
52 update2
|
|
52 update2
|
|
53 update2
|
|
53 update2
|
|
54 update2
|
|
54 update2
|
|
55 update2
|
|
55 update2
|
|
DROP TABLE t1;
|