1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
DROP TABLE IF EXISTS t1,t2;
CREATE TABLE t1 (a <INT_COLUMN>, <CUSTOM_INDEX> (a), 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');
DELETE QUICK FROM t1 WHERE a = 1 OR b > 'foo';
SELECT a,b FROM t1;
a b
2 b
3 c
4 d
5 e
CREATE TABLE t2 (c <CHAR_COLUMN>, d <INT_COLUMN>) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t2 (c,d) SELECT b, a FROM t1;
SELECT c,d FROM t2;
c d
b 2
c 3
d 4
e 5
DELETE QUICK FROM t2, t1.* USING t2, t1 WHERE c IS NULL OR a = d;
SELECT a,b FROM t1;
a b
SELECT c,d FROM t2;
c d
DROP TABLE t2;
DROP TABLE t1;
|