insert_update.result
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:4k
源码类别:
MySQL数据库
开发平台:
Visual C++
- DROP TABLE IF EXISTS 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 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 2
- 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 Extra
- 1 SIMPLE t1 ALL NULL NULL NULL NULL 5
- 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 Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
- Warnings:
- Note 1003 select test.t1.a AS `a`,test.t1.b AS `b`,test.t1.c AS `c` from test.t1
- 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 2
- 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;