range.result

来自「视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.」· RESULT 代码 · 共 1,138 行 · 第 1/3 页

delete from t2;
insert into t2(uid, name) values 
(1, CHAR(64+1)),
(2, CHAR(64+2)),
(3, CHAR(64+3)),
(4, CHAR(64+4)),
(5, CHAR(64+5)),
(6, CHAR(64+6)),
(7, CHAR(64+7)),
(8, CHAR(64+8)),
(9, CHAR(64+9)),
(10, CHAR(64+10)),
(11, CHAR(64+11)),
(12, CHAR(64+12)),
(13, CHAR(64+13)),
(14, CHAR(64+14)),
(15, CHAR(64+15)),
(16, CHAR(64+16)),
(17, CHAR(64+17)),
(18, CHAR(64+18)),
(19, CHAR(64+19)),
(20, CHAR(64+20)),
(21, CHAR(64+21)),
(22, CHAR(64+22)),
(23, CHAR(64+23)),
(24, CHAR(64+24)),
(25, CHAR(64+25)),
(26, CHAR(64+26));
insert into t1(uid, name) select uid, name from t2;
delete from t2;
insert into t2(id, uid, name) select id, uid, name from t1;
select count(*) from t1;
count(*)
1026
select count(*) from t2;
count(*)
1026
analyze table t1,t2;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
test.t2	analyze	status	Table is already up to date
explain select * from t1, t2  where t1.uid=t2.uid AND t1.uid > 0;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	uid_index	uid_index	4	NULL	112	Using where
1	SIMPLE	t2	ref	uid_index	uid_index	4	test.t1.uid	38	
explain select * from t1, t2  where t1.uid=t2.uid AND t2.uid > 0;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	uid_index	uid_index	4	NULL	112	Using where
1	SIMPLE	t2	ref	uid_index	uid_index	4	test.t1.uid	38	
explain select * from t1, t2  where t1.uid=t2.uid AND t1.uid != 0;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	uid_index	uid_index	4	NULL	113	Using where
1	SIMPLE	t2	ref	uid_index	uid_index	4	test.t1.uid	38	
explain select * from t1, t2  where t1.uid=t2.uid AND t2.uid != 0;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	uid_index	uid_index	4	NULL	113	Using where
1	SIMPLE	t2	ref	uid_index	uid_index	4	test.t1.uid	38	
select * from t1, t2  where t1.uid=t2.uid AND t1.uid > 0;
id	name	uid	id	name	uid
1001	A	1	1001	A	1
1002	B	2	1002	B	2
1003	C	3	1003	C	3
1004	D	4	1004	D	4
1005	E	5	1005	E	5
1006	F	6	1006	F	6
1007	G	7	1007	G	7
1008	H	8	1008	H	8
1009	I	9	1009	I	9
1010	J	10	1010	J	10
1011	K	11	1011	K	11
1012	L	12	1012	L	12
1013	M	13	1013	M	13
1014	N	14	1014	N	14
1015	O	15	1015	O	15
1016	P	16	1016	P	16
1017	Q	17	1017	Q	17
1018	R	18	1018	R	18
1019	S	19	1019	S	19
1020	T	20	1020	T	20
1021	U	21	1021	U	21
1022	V	22	1022	V	22
1023	W	23	1023	W	23
1024	X	24	1024	X	24
1025	Y	25	1025	Y	25
1026	Z	26	1026	Z	26
select * from t1, t2  where t1.uid=t2.uid AND t1.uid != 0;
id	name	uid	id	name	uid
1001	A	1	1001	A	1
1002	B	2	1002	B	2
1003	C	3	1003	C	3
1004	D	4	1004	D	4
1005	E	5	1005	E	5
1006	F	6	1006	F	6
1007	G	7	1007	G	7
1008	H	8	1008	H	8
1009	I	9	1009	I	9
1010	J	10	1010	J	10
1011	K	11	1011	K	11
1012	L	12	1012	L	12
1013	M	13	1013	M	13
1014	N	14	1014	N	14
1015	O	15	1015	O	15
1016	P	16	1016	P	16
1017	Q	17	1017	Q	17
1018	R	18	1018	R	18
1019	S	19	1019	S	19
1020	T	20	1020	T	20
1021	U	21	1021	U	21
1022	V	22	1022	V	22
1023	W	23	1023	W	23
1024	X	24	1024	X	24
1025	Y	25	1025	Y	25
1026	Z	26	1026	Z	26
drop table t1,t2;
create table t1 (x bigint unsigned not null);
insert into t1(x) values (0xfffffffffffffff0);
insert into t1(x) values (0xfffffffffffffff1);
select * from t1;
x
18446744073709551600
18446744073709551601
select count(*) from t1 where x>0;
count(*)
2
select count(*) from t1 where x=0;
count(*)
0
select count(*) from t1 where x<0;
count(*)
0
select count(*) from t1 where x < -16;
count(*)
0
select count(*) from t1 where x = -16;
count(*)
0
select count(*) from t1 where x > -16;
count(*)
2
select count(*) from t1 where x = 18446744073709551601;
count(*)
1
create table t2 (x bigint not null);
insert into t2(x) values (-16);
insert into t2(x) values (-15);
select * from t2;
x
-16
-15
select count(*) from t2 where x>0;
count(*)
0
select count(*) from t2 where x=0;
count(*)
0
select count(*) from t2 where x<0;
count(*)
2
select count(*) from t2 where x < -16;
count(*)
0
select count(*) from t2 where x = -16;
count(*)
1
select count(*) from t2 where x > -16;
count(*)
1
select count(*) from t2 where x = 18446744073709551601;
count(*)
0
drop table t1,t2;
create table t1 (x bigint unsigned not null primary key) engine=innodb;
insert into t1(x) values (0xfffffffffffffff0);
insert into t1(x) values (0xfffffffffffffff1);
select * from t1;
x
18446744073709551600
18446744073709551601
select count(*) from t1 where x>0;
count(*)
2
select count(*) from t1 where x=0;
count(*)
0
select count(*) from t1 where x<0;
count(*)
0
select count(*) from t1 where x < -16;
count(*)
0
select count(*) from t1 where x = -16;
count(*)
0
select count(*) from t1 where x > -16;
count(*)
2
select count(*) from t1 where x = 18446744073709551601;
count(*)
1
drop table t1;
create table t1 (a bigint unsigned);
create index t1i on t1(a);
insert into t1 select 18446744073709551615;
insert into t1 select 18446744073709551614;
explain select * from t1 where a <> -1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	t1i	t1i	9	NULL	2	Using where; Using index
select * from t1 where a <> -1;
a
18446744073709551614
18446744073709551615
explain select * from t1 where a > -1 or a < -1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	t1i	t1i	9	NULL	2	Using where; Using index
select * from t1 where a > -1 or a < -1;
a
18446744073709551614
18446744073709551615
explain select * from t1 where a > -1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	t1i	t1i	9	NULL	2	Using where; Using index
select * from t1 where a > -1;
a
18446744073709551614
18446744073709551615
explain select * from t1 where a < -1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
select * from t1 where a < -1;
a
drop table t1;
set names latin1;
create table t1 (a char(10), b text, key (a)) character set latin1;
INSERT INTO t1 (a) VALUES
('111'),('222'),('222'),('222'),('222'),('444'),('aaa'),('AAA'),('bbb');
explain select * from t1 where a='aaa';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	11	const	2	Using where
explain select * from t1 where a=binary 'aaa';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	a	a	11	NULL	2	Using where
explain select * from t1 where a='aaa' collate latin1_bin;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	a	a	11	NULL	2	Using where
explain select * from t1 where a='aaa' collate latin1_german1_ci;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	a	NULL	NULL	NULL	9	Using where
drop table t1;
CREATE TABLE t1 (
`CLIENT` char(3) character set latin1 collate latin1_bin NOT NULL default '000',
`ARG1` char(3) character set latin1 collate latin1_bin NOT NULL default '',
`ARG2` char(3) character set latin1 collate latin1_bin NOT NULL default '',
`FUNCTION` varchar(10) character set latin1 collate latin1_bin NOT NULL default '',
`FUNCTINT` int(11) NOT NULL default '0',
KEY `VERI_CLNT~2` (`ARG1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO t1 VALUES ('000',' 0',' 0','Text 001',0), ('000',' 0',' 1','Text 002',0),
('000',' 1',' 2','Text 003',0), ('000',' 2',' 3','Text 004',0),
('001',' 3',' 0','Text 017',0);
SELECT count(*) FROM t1 WHERE CLIENT='000' AND (ARG1 != ' 1' OR ARG1 != ' 2');
count(*)
4
SELECT count(*) FROM t1 WHERE CLIENT='000' AND (ARG1 != ' 2' OR ARG1 != ' 1');
count(*)
4
drop table t1;
create table t1 (a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
CREATE TABLE t2 (
pk1 int(11) NOT NULL,
pk2 int(11) NOT NULL,
pk3 int(11) NOT NULL,
pk4 int(11) NOT NULL,
filler char(82),
PRIMARY KEY (pk1,pk2,pk3,pk4)
) DEFAULT CHARSET=latin1;
insert into t2 select 1, A.a+10*B.a, 432, 44, 'fillerZ' from t1 A, t1 B;
INSERT INTO t2 VALUES (2621, 2635, 0, 0,'filler'), (2621, 2635, 1, 0,'filler'),
(2621, 2635, 10, 0,'filler'), (2621, 2635, 11, 0,'filler'),
(2621, 2635, 14, 0,'filler'), (2621, 2635, 1000015, 0,'filler');
SELECT * FROM t2
WHERE ((((pk4 =0) AND (pk1 =2621) AND (pk2 =2635)))
OR ((pk4 =1) AND (((pk1 IN ( 7, 2, 1 ))) OR (pk1 =522)) AND ((pk2 IN ( 0, 2635))))
) AND (pk3 >=1000000);
pk1	pk2	pk3	pk4	filler
2621	2635	1000015	0	filler
drop table t1, t2;
create table t1(a char(2), key(a(1)));
insert into t1 values ('x'), ('xx');
explain select a from t1 where a > 'x';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	a	a	2	NULL	2	Using where
select a from t1 where a > 'x';
a
xx
drop table t1;
CREATE TABLE t1 (
OXID varchar(32) COLLATE latin1_german2_ci NOT NULL DEFAULT '',
OXPARENTID varchar(32) COLLATE latin1_german2_ci NOT NULL DEFAULT 'oxrootid',
OXLEFT int NOT NULL DEFAULT '0',
OXRIGHT int NOT NULL DEFAULT '0',
OXROOTID varchar(32) COLLATE latin1_german2_ci NOT NULL DEFAULT '',
PRIMARY KEY  (OXID),
KEY OXNID (OXID),
KEY OXLEFT (OXLEFT),
KEY OXRIGHT (OXRIGHT),
KEY OXROOTID (OXROOTID)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_german2_ci;
INSERT INTO t1 VALUES
('d8c4177d09f8b11f5.52725521','oxrootid',1,40,'d8c4177d09f8b11f5.52725521'),
('d8c4177d151affab2.81582770','d8c4177d09f8b11f5.52725521',2,3,
'd8c4177d09f8b11f5.52725521'),
('d8c4177d206a333d2.74422679','d8c4177d09f8b11f5.52725521',4,5,
'd8c4177d09f8b11f5.52725521'),
('d8c4177d225791924.30714720','d8c4177d09f8b11f5.52725521',6,7,
'd8c4177d09f8b11f5.52725521'),
('d8c4177d2380fc201.39666693','d8c4177d09f8b11f5.52725521',8,9,
'd8c4177d09f8b11f5.52725521'),
('d8c4177d24ccef970.14957924','d8c4177d09f8b11f5.52725521',10,11,
'd8c4177d09f8b11f5.52725521');
EXPLAIN
SELECT s.oxid FROM t1 v, t1 s 
WHERE s.oxrootid = 'd8c4177d09f8b11f5.52725521' AND
v.oxrootid ='d8c4177d09f8b11f5.52725521' AND
s.oxleft > v.oxleft AND s.oxleft < v.oxright;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	v	ref	OXLEFT,OXRIGHT,OXROOTID	OXROOTID	34	const	5	Using where
1	SIMPLE	s	ALL	OXLEFT	NULL	NULL	NULL	5	Range checked for each record (index map: 0x4)
SELECT s.oxid FROM t1 v, t1 s 
WHERE s.oxrootid = 'd8c4177d09f8b11f5.52725521' AND
v.oxrootid ='d8c4177d09f8b11f5.52725521' AND
s.oxleft > v.oxleft AND s.oxleft < v.oxright;
oxid
d8c4177d151affab2.81582770
d8c4177d206a333d2.74422679
d8c4177d225791924.30714720
d8c4177d2380fc201.39666693
d8c4177d24ccef970.14957924
DROP TABLE t1;
create table t1 (
c1  char(10), c2  char(10), c3  char(10), c4  char(10),
c5  char(10), c6  char(10), c7  char(10), c8  char(10),
c9  char(10), c10 char(10), c11 char(10), c12 char(10),
c13 char(10), c14 char(10), c15 char(10), c16 char(10),
index(c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12,c13,c14,c15,c16)
);
insert into t1 (c1) values ('1'),('1'),('1'),('1');
select * from t1 where
c1 in ("abcdefgh", "123456789", "qwertyuio", "asddfgh", 
"abcdefg1", "123456781", "qwertyui1", "asddfg1", 
"abcdefg2", "123456782", "qwertyui2", "asddfg2", 
"abcdefg3", "123456783", "qwertyui3", "asddfg3", 
"abcdefg4", "123456784", "qwertyui4", "asddfg4",
"abcdefg5", "123456785", "qwertyui5", "asddfg5",
"abcdefg6", "123456786", "qwertyui6", "asddfg6",
"abcdefg7", "123456787", "qwertyui7", "asddfg7",
"abcdefg8", "123456788", "qwertyui8", "asddfg8",
"abcdefg9", "123456789", "qwertyui9", "asddfg9",
"abcdefgA", "12345678A", "qwertyuiA", "asddfgA",
"abcdefgB", "12345678B", "qwertyuiB", "asddfgB",
"abcdefgC", "12345678C", "qwertyuiC", "asddfgC")
and c2 in ("abcdefgh", "123456789", "qwertyuio", "asddfgh", 
"abcdefg1", "123456781", "qwertyui1", "asddfg1", 
"abcdefg2", "123456782", "qwertyui2", "asddfg2", 
"abcdefg3", "123456783", "qwertyui3", "asddfg3", 
"abcdefg4", "123456784", "qwertyui4", "asddfg4", 
"abcdefg5", "123456785", "qwertyui5", "asddfg5",
"abcdefg6", "123456786", "qwertyui6", "asddfg6",
"abcdefg7", "123456787", "qwertyui7", "asddfg7",
"abcdefg8", "123456788", "qwertyui8", "asddfg8",
"abcdefg9", "123456789", "qwertyui9", "asddfg9",
"abcdefgA", "12345678A", "qwertyuiA", "asddfgA",
"abcdefgB", "12345678B", "qwertyuiB", "asddfgB",
"abcdefgC", "12345678C", "qwertyuiC", "asddfgC")
and c3 in ("abcdefgh", "123456789", "qwertyuio", "asddfgh", 
"abcdefg1", "123456781", "qwertyui1", "asddfg1", 
"abcdefg2", "123456782", "qwertyui2", "asddfg2", 
"abcdefg3", "123456783", "qwertyui3", "asddfg3", 
"abcdefg4", "123456784", "qwertyui4", "asddfg4", 
"abcdefg5", "123456785", "qwertyui5", "asddfg5",