DROP TABLE IF EXISTS t1, t2;
CREATE TABLE t1 (a INT, b INT, c INT, UNIQUE (A), UNIQUE(B));
INSERT t1 VALUES (1,2,10), (3,4,20);
INSERT t1 VALUES (5,6,30) ON DUPLICATE KEY UPDATE c=c+100;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	20
5	6	30
INSERT t1 VALUES (5,7,40) ON DUPLICATE KEY UPDATE c=c+100;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	20
5	6	130
INSERT t1 VALUES (8,4,50) ON DUPLICATE KEY UPDATE c=c+1000;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	1020
5	6	130
INSERT t1 VALUES (1,4,60) ON DUPLICATE KEY UPDATE c=c+10000;
SELECT * FROM t1;
a	b	c
1	2	10010
3	4	1020
5	6	130
INSERT t1 VALUES (1,9,70) ON DUPLICATE KEY UPDATE c=c+100000, b=4;
ERROR 23000: Duplicate entry '4' for key 'b'
SELECT * FROM t1;
a	b	c
1	2	10010
3	4	1020
5	6	130
TRUNCATE TABLE t1;
INSERT t1 VALUES (1,2,10), (3,4,20);
INSERT t1 VALUES (5,6,30), (7,4,40), (8,9,60) ON DUPLICATE KEY UPDATE c=c+100;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	120
5	6	30
8	9	60
INSERT t1 SET a=5 ON DUPLICATE KEY UPDATE b=0;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	120
5	0	30
8	9	60
INSERT t1 VALUES (2,1,11), (7,4,40) ON DUPLICATE KEY UPDATE c=c+VALUES(a);
SELECT *, VALUES(a) FROM t1;
a	b	c	VALUES(a)
1	2	10	NULL
3	4	127	NULL
5	0	30	NULL
8	9	60	NULL
2	1	11	NULL
explain extended SELECT *, VALUES(a) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	100.00	
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,values(`test`.`t1`.`a`) AS `VALUES(a)` from `test`.`t1`
explain extended select * from t1 where values(a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where values(`test`.`t1`.`a`)
DROP TABLE t1;
create table t1(a int primary key, b int);
insert into t1 values(1,1),(2,2),(3,3),(4,4),(5,5);
select * from t1;
a	b
1	1
2	2
3	3
4	4
5	5
insert into t1 values(4,14),(5,15),(6,16),(7,17),(8,18)
on duplicate key update b=b+10;
affected rows: 7
info: Records: 5  Duplicates: 2  Warnings: 0
select * from t1;
a	b
1	1
2	2
3	3
4	14
5	15
6	16
7	17
8	18
replace into t1 values(5,25),(6,26),(7,27),(8,28),(9,29);
affected rows: 9
info: Records: 5  Duplicates: 4  Warnings: 0
select * from t1;
a	b
1	1
2	2
3	3
4	14
5	25
6	26
7	27
8	28
9	29
drop table t1;
CREATE TABLE t1 (a INT, b INT, c INT, UNIQUE (A), UNIQUE(B));
INSERT t1 VALUES (1,2,10), (3,4,20);
INSERT t1 SELECT 5,6,30 FROM DUAL ON DUPLICATE KEY UPDATE c=c+100;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	20
5	6	30
INSERT t1 SELECT 5,7,40 FROM DUAL ON DUPLICATE KEY UPDATE c=c+100;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	20
5	6	130
INSERT t1 SELECT 8,4,50 FROM DUAL ON DUPLICATE KEY UPDATE c=c+1000;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	1020
5	6	130
INSERT t1 SELECT 1,4,60 FROM DUAL ON DUPLICATE KEY UPDATE c=c+10000;
SELECT * FROM t1;
a	b	c
1	2	10010
3	4	1020
5	6	130
INSERT t1 SELECT 1,9,70 FROM DUAL ON DUPLICATE KEY UPDATE c=c+100000, b=4;
ERROR 23000: Duplicate entry '4' for key 'b'
SELECT * FROM t1;
a	b	c
1	2	10010
3	4	1020
5	6	130
TRUNCATE TABLE t1;
INSERT t1 VALUES (1,2,10), (3,4,20);
CREATE TABLE t2 (a INT, b INT, c INT, d INT);
INSERT t2 VALUES (5,6,30,1), (7,4,40,1), (8,9,60,1);
INSERT t2 VALUES (2,1,11,2), (7,4,40,2);
INSERT t1 SELECT a,b,c FROM t2 WHERE d=1 ON DUPLICATE KEY UPDATE c=t1.c+100;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	120
5	6	30
8	9	60
INSERT t1 SET a=5 ON DUPLICATE KEY UPDATE b=0;
SELECT * FROM t1;
a	b	c
1	2	10
3	4	120
5	0	30
8	9	60
INSERT t1 SELECT a,b,c FROM t2 WHERE d=2 ON DUPLICATE KEY UPDATE c=c+VALUES(a);
ERROR 23000: Column 'c' in field list is ambiguous
INSERT t1 SELECT a,b,c FROM t2 WHERE d=2 ON DUPLICATE KEY UPDATE c=t1.c+VALUES(t1.a);
SELECT *, VALUES(a) FROM t1;
a	b	c	VALUES(a)
1	2	10	NULL
3	4	127	NULL
5	0	30	NULL
8	9	60	NULL
2	1	11	NULL
DROP TABLE t1;
DROP TABLE t2;
create table t1 (a int not null unique) engine=myisam;
insert into t1 values (1),(2);
insert ignore into t1 select 1 on duplicate key update a=2;
select * from t1;
a
1
2
insert ignore into t1 select a from t1 as t2 on duplicate key update a=t1.a+1 ;
select * from t1;
a
1
3
insert into t1 select 1 on duplicate key update a=2;
select * from t1;
a
2
3
insert into t1 select a from t1 on duplicate key update a=a+1 ;
ERROR 23000: Column 'a' in field list is ambiguous
insert ignore into t1 select a from t1 on duplicate key update a=t1.a+1 ;
ERROR 23000: Column 't1.a' in field list is ambiguous
drop table t1;
CREATE TABLE t1 (
a BIGINT(20) NOT NULL DEFAULT 0,
PRIMARY KEY  (a)
) ENGINE=MyISAM;
INSERT INTO t1 ( a ) SELECT 0 ON DUPLICATE KEY UPDATE a = a + VALUES (a) ;
DROP TABLE t1;
CREATE TABLE t1
(
a   BIGINT UNSIGNED,
b   BIGINT UNSIGNED,
PRIMARY KEY (a)
);
INSERT INTO t1 VALUES (45, 1) ON DUPLICATE KEY UPDATE b =
IF(VALUES(b) > t1.b, VALUES(b), t1.b);
SELECT * FROM t1;
a	b
45	1
INSERT INTO t1 VALUES (45, 2) ON DUPLICATE KEY UPDATE b =
IF(VALUES(b) > t1.b, VALUES(b), t1.b);
SELECT * FROM t1;
a	b
45	2
INSERT INTO t1 VALUES (45, 1) ON DUPLICATE KEY UPDATE b = 
IF(VALUES(b) > t1.b, VALUES(b), t1.b);
SELECT * FROM t1;
a	b
45	2
DROP TABLE t1;
CREATE TABLE t1 (i INT PRIMARY KEY, j INT);
INSERT INTO t1 SELECT 1, j;
ERROR 42S22: Unknown column 'j' in 'field list'
DROP TABLE t1;
CREATE TABLE t1 (i INT PRIMARY KEY, j INT);
CREATE TABLE t2 (a INT, b INT);
CREATE TABLE t3 (a INT, c INT);
INSERT INTO t1 SELECT 1, a FROM t2 NATURAL JOIN t3 
ON DUPLICATE KEY UPDATE j= a;
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (i INT PRIMARY KEY, j INT);
CREATE TABLE t2 (a INT);
INSERT INTO t1 VALUES (1, 1);
INSERT INTO t2 VALUES (1), (3);
INSERT INTO t1 SELECT 1, COUNT(*) FROM t2 ON DUPLICATE KEY UPDATE j= a;
ERROR 42S22: Unknown column 'a' in 'field list'
DROP TABLE t1,t2;
SET SQL_MODE = 'TRADITIONAL';
CREATE TABLE t1 (a INT PRIMARY KEY, b INT NOT NULL);
INSERT INTO t1 (a) VALUES (1);
ERROR HY000: Field 'b' doesn't have a default value
INSERT INTO t1 (a) VALUES (1) ON DUPLICATE KEY UPDATE a = b;
ERROR HY000: Field 'b' doesn't have a default value
INSERT INTO t1 (a) VALUES (1) ON DUPLICATE KEY UPDATE b = b;
ERROR HY000: Field 'b' doesn't have a default value
SELECT * FROM t1;
a	b
DROP TABLE t1;
CREATE TABLE t1 (f1 INT AUTO_INCREMENT PRIMARY KEY,
f2 VARCHAR(5) NOT NULL UNIQUE);
INSERT t1 (f2) VALUES ('test') ON DUPLICATE KEY UPDATE f1 = LAST_INSERT_ID(f1);
SELECT LAST_INSERT_ID();
LAST_INSERT_ID()
1
INSERT t1 (f2) VALUES ('test') ON DUPLICATE KEY UPDATE f1 = LAST_INSERT_ID(f1);
SELECT LAST_INSERT_ID();
LAST_INSERT_ID()
1
DROP TABLE t1;
SET SQL_MODE='NO_AUTO_VALUE_ON_ZERO';
CREATE TABLE `t1` (
`id` int(11) PRIMARY KEY auto_increment,
`f1` varchar(10) NOT NULL UNIQUE
);
INSERT IGNORE INTO t1 (f1) VALUES ("test1")
ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id);
INSERT IGNORE INTO t1 (f1) VALUES ("test1")
ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id);
SELECT LAST_INSERT_ID();
LAST_INSERT_ID()
1
SELECT * FROM t1;
id	f1
1	test1
INSERT IGNORE INTO t1 (f1) VALUES ("test2")
ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id);
SELECT * FROM t1;
id	f1
1	test1
2	test2
INSERT IGNORE INTO t1 (f1) VALUES ("test2")
ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id);
SELECT LAST_INSERT_ID();
LAST_INSERT_ID()
2
SELECT * FROM t1;
id	f1
1	test1
2	test2
INSERT IGNORE INTO t1 (f1) VALUES ("test3")
ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id);
SELECT LAST_INSERT_ID();
LAST_INSERT_ID()
3
SELECT * FROM t1;
id	f1
1	test1
2	test2
3	test3
DROP TABLE t1;
CREATE TABLE `t1` (
`id` int(11) PRIMARY KEY auto_increment,
`f1` varchar(10) NOT NULL UNIQUE
);
INSERT IGNORE INTO t1 (f1) VALUES ("test1")
ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id);
SELECT LAST_INSERT_ID();
LAST_INSERT_ID()
1
SELECT * FROM t1;
id	f1
1	test1
INSERT IGNORE INTO t1 (f1) VALUES ("test1"),("test4")
ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id);
SELECT LAST_INSERT_ID();
LAST_INSERT_ID()
2
SELECT * FROM t1;
id	f1
1	test1
2	test4
DROP TABLE t1;
CREATE TABLE `t1` (
`id` int(11) PRIMARY KEY auto_increment,
`f1` varchar(10) NOT NULL UNIQUE,
tim1 timestamp default '2003-01-01 00:00:00' on update current_timestamp
);
INSERT INTO t1 (f1) VALUES ("test1");
SELECT id, f1 FROM t1;
id	f1
1	test1
REPLACE INTO t1 VALUES (0,"test1",null);
SELECT id, f1 FROM t1;
id	f1
0	test1
DROP TABLE t1;
SET SQL_MODE='';
CREATE TABLE t1 (
id INT AUTO_INCREMENT PRIMARY KEY,
c1 CHAR(1) UNIQUE KEY,
cnt INT DEFAULT 1
);
INSERT INTO t1 (c1) VALUES ('A'), ('B'), ('C');
SELECT * FROM t1;
id	c1	cnt
1	A	1
2	B	1
3	C	1
INSERT  INTO t1 (c1) VALUES ('A'), ('X'), ('Y'), ('Z')
ON DUPLICATE KEY UPDATE cnt=cnt+1;
SELECT * FROM t1;
id	c1	cnt
1	A	2
2	B	1
3	C	1
4	X	1
5	Y	1
6	Z	1
DROP TABLE t1;
CREATE TABLE t1 (
id INT AUTO_INCREMENT PRIMARY KEY,
c1 INT NOT NULL,
cnt INT DEFAULT 1
);
INSERT INTO t1 (id,c1) VALUES (1,10);
SELECT * FROM t1;
id	c1	cnt
1	10	1
CREATE TABLE t2 (id INT, c1 INT);
INSERT INTO t2 VALUES (1,NULL), (2,2);
INSERT INTO t1 (id,c1) SELECT 1,NULL
ON DUPLICATE KEY UPDATE c1=NULL;
ERROR 23000: Column 'c1' cannot be null
SELECT * FROM t1;
id	c1	cnt
1	10	1
INSERT IGNORE INTO t1 (id,c1) SELECT 1,NULL
ON DUPLICATE KEY UPDATE c1=NULL, cnt=cnt+1;
Warnings:
Warning	1048	Column 'c1' cannot be null
Error	1048	Column 'c1' cannot be null
SELECT * FROM t1;
id	c1	cnt
1	0	2
INSERT IGNORE INTO t1 (id,c1) SELECT * FROM t2
ON DUPLICATE KEY UPDATE c1=NULL, cnt=cnt+1;
Warnings:
Warning	1048	Column 'c1' cannot be null
Error	1048	Column 'c1' cannot be null
SELECT * FROM t1;
id	c1	cnt
1	0	3
2	2	1
DROP TABLE t1;
create table t1(f1 int primary key,
f2 timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP);
insert into t1(f1) values(1);
select @stamp1:=f2 from t1;
@stamp1:=f2
#
insert into t1(f1) values(1) on duplicate key update f1=1;
select @stamp2:=f2 from t1;
@stamp2:=f2
#
select if( @stamp1 = @stamp2, "correct", "wrong");
if( @stamp1 = @stamp2, "correct", "wrong")
correct
drop table t1;