type_date.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 169 行

drop table if exists t1,t2;
create table t1 (a char(16), b date, c datetime);
insert into t1 SET a='test 2000-01-01', b='2000-01-01', c='2000-01-01';
select * from t1 where c = '2000-01-01';
a	b	c
test 2000-01-01	2000-01-01	2000-01-01 00:00:00
select * from t1 where b = '2000-01-01';
a	b	c
test 2000-01-01	2000-01-01	2000-01-01 00:00:00
drop table t1;
CREATE TABLE t1 (name char(6),cdate date);
INSERT INTO t1 VALUES ('name1','1998-01-01');
INSERT INTO t1 VALUES ('name2','1998-01-01');
INSERT INTO t1 VALUES ('name1','1998-01-02');
INSERT INTO t1 VALUES ('name2','1998-01-02');
CREATE TABLE t2 (cdate date, note char(6));
INSERT INTO t2 VALUES ('1998-01-01','note01');
INSERT INTO t2 VALUES ('1998-01-02','note02');
select name,t1.cdate,note from t1,t2 where t1.cdate=t2.cdate and t1.cdate='1998-01-01';
name	cdate	note
name1	1998-01-01	note01
name2	1998-01-01	note01
drop table t1,t2;
CREATE TABLE t1 ( datum DATE );
INSERT INTO t1 VALUES ( "2000-1-1" );
INSERT INTO t1 VALUES ( "2000-1-2" );
INSERT INTO t1 VALUES ( "2000-1-3" );
INSERT INTO t1 VALUES ( "2000-1-4" );
INSERT INTO t1 VALUES ( "2000-1-5" );
SELECT * FROM t1 WHERE datum BETWEEN cast("2000-1-2" as date) AND cast("2000-1-4" as date);
datum
2000-01-02
2000-01-03
2000-01-04
SELECT * FROM t1 WHERE datum BETWEEN cast("2000-1-2" as date) AND datum - INTERVAL 100 DAY;
datum
DROP TABLE t1;
CREATE TABLE t1 (
user_id char(10),
summa int(11),
rdate date
);
INSERT INTO t1 VALUES ('aaa',100,'1998-01-01');
INSERT INTO t1 VALUES ('aaa',200,'1998-01-03');
INSERT INTO t1 VALUES ('bbb',50,'1998-01-02');
INSERT INTO t1 VALUES ('bbb',200,'1998-01-04');
select max(rdate) as s from t1 where rdate < '1998-01-03' having s> "1998-01-01";
s
1998-01-02
select max(rdate) as s from t1 having s="1998-01-04";
s
1998-01-04
select max(rdate+0) as s from t1 having s="19980104";
s
19980104
drop table t1;
create table t1 (date date);
insert into t1 values ("2000-08-10"),("2000-08-11");
select date_add(date,INTERVAL 1 DAY),date_add(date,INTERVAL 1 SECOND) from t1;
date_add(date,INTERVAL 1 DAY)	date_add(date,INTERVAL 1 SECOND)
2000-08-11	2000-08-10 00:00:01
2000-08-12	2000-08-11 00:00:01
drop table t1;
CREATE TABLE t1(AFIELD INT);
INSERT INTO t1 VALUES(1);
CREATE TABLE t2(GMT  VARCHAR(32));
INSERT INTO t2 VALUES('GMT-0800');
SELECT DATE_FORMAT("2002-03-06 10:11:12", CONCAT('%a, %d %M %Y %H:%i:%s ' ,  t2.GMT)) FROM t1, t2 GROUP BY t1.AFIELD;
DATE_FORMAT("2002-03-06 10:11:12", CONCAT('%a, %d %M %Y %H:%i:%s ' ,  t2.GMT))
Wed, 06 March 2002 10:11:12 GMT-0800
INSERT INTO t1 VALUES(1);
SELECT DATE_FORMAT("2002-03-06 10:11:12", CONCAT('%a, %d %M %Y %H:%i:%s ' ,  t2.GMT)), DATE_FORMAT("2002-03-06 10:11:12",  CONCAT('%a, %d %M %Y %H:%i:%s ' ,  t2.GMT)) FROM t1,t2 GROUP BY t1.AFIELD;
DATE_FORMAT("2002-03-06 10:11:12", CONCAT('%a, %d %M %Y %H:%i:%s ' ,  t2.GMT))	DATE_FORMAT("2002-03-06 10:11:12",  CONCAT('%a, %d %M %Y %H:%i:%s ' ,  t2.GMT))
Wed, 06 March 2002 10:11:12 GMT-0800	Wed, 06 March 2002 10:11:12 GMT-0800
drop table t1,t2;
CREATE TABLE t1 (f1 time default NULL, f2 time default NULL);
INSERT INTO t1 (f1, f2) VALUES ('09:00', '12:00');
SELECT DATE_FORMAT(f1, "%l.%i %p") , DATE_FORMAT(f2, "%l.%i %p") FROM t1;
DATE_FORMAT(f1, "%l.%i %p")	DATE_FORMAT(f2, "%l.%i %p")
9.00 AM	12.00 PM
DROP TABLE t1;
CREATE TABLE t1 (f1 DATE);
CREATE TABLE t2 (f2 VARCHAR(8));
CREATE TABLE t3 (f2 CHAR(8));
INSERT INTO t1 VALUES ('1978-11-26');
INSERT INTO t2 SELECT f1+0 FROM t1;
INSERT INTO t2 SELECT f1+0 FROM t1 UNION SELECT f1+0 FROM t1;
INSERT INTO t3 SELECT f1+0 FROM t1;
INSERT INTO t3 SELECT f1+0 FROM t1 UNION SELECT f1+0 FROM t1;
SELECT * FROM t2;
f2
19781126
19781126
SELECT * FROM t3;
f2
19781126
19781126
DROP TABLE t1, t2, t3;
CREATE TABLE t1 (y YEAR);
INSERT INTO t1 VALUES ('abc');
Warnings:
Warning	1366	Incorrect integer value: 'abc' for column 'y' at row 1
SELECT * FROM t1;
y
0000
DROP TABLE t1;
create table t1(start_date date, end_date date);
insert into t1 values ('2000-01-01','2000-01-02');
select 1 from t1 where cast('2000-01-01 12:01:01' as datetime) between start_date and end_date;
1
1
drop table t1;
select @d:=1111, year(@d), month(@d), day(@d), cast(@d as date);
@d:=1111	year(@d)	month(@d)	day(@d)	cast(@d as date)
1111	2000	11	11	2000-11-11
select @d:=011111, year(@d), month(@d), day(@d), cast(@d as date);
@d:=011111	year(@d)	month(@d)	day(@d)	cast(@d as date)
11111	2001	11	11	2001-11-11
select @d:=1311, year(@d), month(@d), day(@d), cast(@d as date);
@d:=1311	year(@d)	month(@d)	day(@d)	cast(@d as date)
1311	NULL	NULL	NULL	NULL
Warnings:
Warning	1292	Truncated incorrect datetime value: '1311'
Warning	1292	Truncated incorrect datetime value: '1311'
Warning	1292	Truncated incorrect datetime value: '1311'
Warning	1292	Truncated incorrect datetime value: '1311'
create table t1 (d  date , dt datetime , ts timestamp);
insert into t1 values (9912101,9912101,9912101);
Warnings:
Warning	1264	Out of range value adjusted for column 'd' at row 1
Warning	1264	Out of range value adjusted for column 'dt' at row 1
Warning	1265	Data truncated for column 'ts' at row 1
insert into t1 values (11111,11111,11111);
select * from t1;
d	dt	ts
0000-00-00	0000-00-00 00:00:00	0000-00-00 00:00:00
2001-11-11	2001-11-11 00:00:00	2001-11-11 00:00:00
drop table t1;
CREATE TABLE t1 (a DATE, b int, PRIMARY KEY (a,b));
INSERT INTO t1 VALUES (DATE(NOW()), 1);
SELECT COUNT(*) FROM t1 WHERE a = NOW();
COUNT(*)
0
EXPLAIN SELECT COUNT(*) FROM t1 WHERE a = NOW();
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
INSERT INTO t1 VALUES (DATE(NOW()), 2);
SELECT COUNT(*) FROM t1 WHERE a = NOW();
COUNT(*)
0
EXPLAIN SELECT COUNT(*) FROM t1 WHERE a = NOW();
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 COUNT(*) FROM t1 WHERE a = NOW() AND b = 1;
COUNT(*)
0
EXPLAIN SELECT COUNT(*) FROM t1 WHERE a = NOW() AND b = 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
ALTER TABLE t1 DROP PRIMARY KEY;
SELECT COUNT(*) FROM t1 WHERE a = NOW();
COUNT(*)
0
EXPLAIN SELECT COUNT(*) FROM t1 WHERE a = NOW();
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
DROP TABLE t1;
End of 5.0 tests