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			320 lines
		
	
	
	
		
			11 KiB
		
	
	
	
		
			Text
		
	
	
	
	
	
			
		
		
	
	
			320 lines
		
	
	
	
		
			11 KiB
		
	
	
	
		
			Text
		
	
	
	
	
	
drop table if exists t1, test;
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select extract(DAY_MICROSECOND FROM "1999-01-02 10:11:12.000123");
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extract(DAY_MICROSECOND FROM "1999-01-02 10:11:12.000123")
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2101112000123
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select extract(HOUR_MICROSECOND FROM "1999-01-02 10:11:12.000123");
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extract(HOUR_MICROSECOND FROM "1999-01-02 10:11:12.000123")
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101112000123
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select extract(MINUTE_MICROSECOND FROM "1999-01-02 10:11:12.000123");
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extract(MINUTE_MICROSECOND FROM "1999-01-02 10:11:12.000123")
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1112000123
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select extract(SECOND_MICROSECOND FROM "1999-01-02 10:11:12.000123");
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extract(SECOND_MICROSECOND FROM "1999-01-02 10:11:12.000123")
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12000123
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select extract(MICROSECOND FROM "1999-01-02 10:11:12.000123");
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extract(MICROSECOND FROM "1999-01-02 10:11:12.000123")
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123
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select date_format("1997-12-31 23:59:59.000002", "%f");
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date_format("1997-12-31 23:59:59.000002", "%f")
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000002
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select date_add("1997-12-31 23:59:59.000002",INTERVAL "10000 99:99:99.999999" DAY_MICROSECOND) as exp;
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exp
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2025-05-23 04:40:39.000001
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select date_add("1997-12-31 23:59:59.000002",INTERVAL "10000:99:99.999999" HOUR_MICROSECOND) as exp;
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exp
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1999-02-21 17:40:39.000001
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select date_add("1997-12-31 23:59:59.000002",INTERVAL "10000:99.999999" MINUTE_MICROSECOND) as exp;
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exp
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1998-01-07 22:41:39.000001
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select date_add("1997-12-31 23:59:59.000002",INTERVAL "10000.999999" SECOND_MICROSECOND) as exp;
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exp
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1998-01-01 02:46:40.000001
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select date_add("1997-12-31 23:59:59.000002",INTERVAL "999999" MICROSECOND) as exp;
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exp
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1998-01-01 00:00:00.000001
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select date_sub("1998-01-01 00:00:00.000001",INTERVAL "1 1:1:1.000002" DAY_MICROSECOND) as exp;
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exp
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1997-12-30 22:58:58.999999
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select date_sub("1998-01-01 00:00:00.000001",INTERVAL "1:1:1.000002" HOUR_MICROSECOND) as exp;
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exp
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1997-12-31 22:58:58.999999
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select date_sub("1998-01-01 00:00:00.000001",INTERVAL "1:1.000002" MINUTE_MICROSECOND) as exp;
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exp
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1997-12-31 23:58:58.999999
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select date_sub("1998-01-01 00:00:00.000001",INTERVAL "1.000002" SECOND_MICROSECOND) as exp;
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exp
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1997-12-31 23:59:58.999999
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select date_sub("1998-01-01 00:00:00.000001",INTERVAL "000002" MICROSECOND) as exp;
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exp
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1997-12-31 23:59:59.999999
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select adddate("1997-12-31 23:59:59.000001", 10);
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adddate("1997-12-31 23:59:59.000001", 10)
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1998-01-10 23:59:59.000001
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select subdate("1997-12-31 23:59:59.000001", 10);
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subdate("1997-12-31 23:59:59.000001", 10)
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1997-12-21 23:59:59.000001
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select datediff("1997-12-31 23:59:59.000001","1997-12-30");
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datediff("1997-12-31 23:59:59.000001","1997-12-30")
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1
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select datediff("1997-11-30 23:59:59.000001","1997-12-31");
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datediff("1997-11-30 23:59:59.000001","1997-12-31")
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-31
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SET @@SQL_MODE="ALLOW_INVALID_DATES";
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select datediff("1997-11-31 23:59:59.000001","1997-12-31");
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datediff("1997-11-31 23:59:59.000001","1997-12-31")
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NULL
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Warnings:
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Warning	1292	Incorrect datetime value: '1997-11-31 23:59:59.000001'
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SET @@SQL_MODE="";
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select datediff("1997-11-31 23:59:59.000001","1997-12-31");
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datediff("1997-11-31 23:59:59.000001","1997-12-31")
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NULL
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Warnings:
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Warning	1292	Incorrect datetime value: '1997-11-31 23:59:59.000001'
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select datediff("1997-11-30 23:59:59.000001",null);
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datediff("1997-11-30 23:59:59.000001",null)
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NULL
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select weekofyear("1997-11-30 23:59:59.000001");
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weekofyear("1997-11-30 23:59:59.000001")
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48
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select makedate(03,1);
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makedate(03,1)
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2003-01-01
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select makedate('0003',1);
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makedate('0003',1)
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2003-01-01
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select makedate(1997,1);
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makedate(1997,1)
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1997-01-01
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select makedate(1997,0);
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makedate(1997,0)
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NULL
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select makedate(9999,365);
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makedate(9999,365)
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9999-12-31
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select makedate(9999,366);
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makedate(9999,366)
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NULL
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select makedate(100,1);
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makedate(100,1)
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0100-01-01
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select addtime("1997-12-31 23:59:59.999999", "1 1:1:1.000002") as exp;
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exp
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1998-01-02 01:01:01.000001
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select subtime("1997-12-31 23:59:59.000001", "1 1:1:1.000002") as exp;
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exp
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1997-12-30 22:58:57.999999
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select addtime("1997-12-31 23:59:59.999999", "1998-01-01 01:01:01.999999") as exp;
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exp
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NULL
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Warnings:
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Warning	1292	Incorrect INTERVAL DAY TO SECOND value: '1998-01-01 01:01:01.999999'
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select subtime("1997-12-31 23:59:59.999999", "1998-01-01 01:01:01.999999") as exp;
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exp
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NULL
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Warnings:
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Warning	1292	Incorrect INTERVAL DAY TO SECOND value: '1998-01-01 01:01:01.999999'
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select subtime("01:00:00.999999", "02:00:00.999998") as exp;
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exp
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-00:59:59.999999
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select subtime("02:01:01.999999", "01:01:01.999999") as exp;
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exp
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01:00:00
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select timediff("1997-01-01 23:59:59.000001","1995-12-31 23:59:59.000002") as exp;
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exp
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838:59:59.999999
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Warnings:
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Warning	1292	Truncated incorrect time value: '8807:59:59.999999'
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select timediff("1997-12-31 23:59:59.000001","1997-12-30 01:01:01.000002") as exp;
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exp
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46:58:57.999999
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select timediff("1997-12-30 23:59:59.000001","1997-12-31 23:59:59.000002") as exp;
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exp
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-24:00:00.000001
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select timediff("1997-12-31 23:59:59.000001","23:59:59.000001") as exp;
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exp
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NULL
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select timediff("2000:01:01 00:00:00", "2000:01:01 00:00:00.000001") as exp;
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exp
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-00:00:00.000001
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select timediff("2005-01-11 15:48:49.999999", "2005-01-11 15:48:50") as exp;
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exp
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-00:00:00.000001
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select maketime(10,11,12);
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maketime(10,11,12)
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10:11:12
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select maketime(25,11,12);
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maketime(25,11,12)
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25:11:12
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select maketime(-25,11,12);
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maketime(-25,11,12)
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-25:11:12
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select timestamp("2001-12-01", "01:01:01.999999");
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timestamp("2001-12-01", "01:01:01.999999")
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2001-12-01 01:01:01.999999
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select timestamp("2001-13-01", "01:01:01.000001");
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timestamp("2001-13-01", "01:01:01.000001")
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NULL
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Warnings:
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Warning	1292	Incorrect datetime value: '2001-13-01'
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select timestamp("2001-12-01", "25:01:01");
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timestamp("2001-12-01", "25:01:01")
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2001-12-02 01:01:01
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select timestamp("2001-12-01 01:01:01.000100");
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timestamp("2001-12-01 01:01:01.000100")
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2001-12-01 01:01:01.000100
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select timestamp("2001-12-01");
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timestamp("2001-12-01")
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2001-12-01 00:00:00
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select day("1997-12-31 23:59:59.000001");
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day("1997-12-31 23:59:59.000001")
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31
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select date("1997-12-31 23:59:59.000001");
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date("1997-12-31 23:59:59.000001")
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1997-12-31
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select date("1997-13-31 23:59:59.000001");
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date("1997-13-31 23:59:59.000001")
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NULL
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Warnings:
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Warning	1292	Incorrect datetime value: '1997-13-31 23:59:59.000001'
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select time("1997-12-31 23:59:59.000001");
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time("1997-12-31 23:59:59.000001")
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23:59:59.000001
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select time("1997-12-31 25:59:59.000001");
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time("1997-12-31 25:59:59.000001")
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NULL
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Warnings:
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Warning	1292	Incorrect time value: '1997-12-31 25:59:59.000001'
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select microsecond("1997-12-31 23:59:59.000001");
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microsecond("1997-12-31 23:59:59.000001")
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1
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create table t1 
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select makedate(1997,1) as f1,
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addtime(cast("1997-12-31 23:59:59.000001" as datetime(6)), "1 1:1:1.000002") as f2,
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addtime(cast("23:59:59.999999" as time(6)) , "1 1:1:1.000002") as f3,
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timediff("1997-12-31 23:59:59.000001","1997-12-30 01:01:01.000002") as f4,
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timediff("1997-12-30 23:59:59.000001","1997-12-31 23:59:59.000002") as f5,
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maketime(10,11,12) as f6,
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timestamp(cast("2001-12-01" as date), "01:01:01") as f7,
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date("1997-12-31 23:59:59.000001") as f8,
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time("1997-12-31 23:59:59.000001") as f9;
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describe t1;
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Field	Type	Null	Key	Default	Extra
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f1	date	YES		NULL	
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f2	datetime(6)	YES		NULL	
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f3	time(6)	YES		NULL	
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f4	time(6)	YES		NULL	
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f5	time(6)	YES		NULL	
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f6	time	YES		NULL	
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f7	datetime	YES		NULL	
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f8	date	YES		NULL	
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f9	time(6)	YES		NULL	
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select * from t1;
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f1	f2	f3	f4	f5	f6	f7	f8	f9
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1997-01-01	1998-01-02 01:01:00.000003	49:01:01.000001	46:58:57.999999	-24:00:00.000001	10:11:12	2001-12-01 01:01:01	1997-12-31	23:59:59.000001
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create table test(t1 datetime, t2 time, t3 time, t4 datetime);
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insert into test values 
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('2001-01-01 01:01:01', '01:01:01', null, '2001-02-01 01:01:01'),
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('2001-01-01 01:01:01', '-01:01:01', '-23:59:59', "1997-12-31 23:59:59.000001"),
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('1997-12-31 23:59:59.000001', '-23:59:59', '-01:01:01', '2001-01-01 01:01:01'),
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('2001-01-01 01:01:01', '01:01:01', '-1 01:01:01', null),
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('2001-01-01 01:01:01', '-01:01:01', '1 01:01:01', '2001-01-01 01:01:01'),
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('2001-01-01 01:01:01', null, '-1 01:01:01', null),
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(null, null, null, null),
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('2001-01-01 01:01:01', '01:01:01', '1 01:01:01', '2001-01-01 01:01:01');
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SELECT ADDTIME(t1,t2) As ttt, ADDTIME(t2, t3) As qqq from test;
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ttt	qqq
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2001-01-01 02:02:02	NULL
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2001-01-01 00:00:00	-25:01:00
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1997-12-31 00:00:00	-25:01:00
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2001-01-01 02:02:02	-24:00:00
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2001-01-01 00:00:00	24:00:00
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NULL	NULL
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NULL	NULL
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2001-01-01 02:02:02	26:02:02
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SELECT TIMEDIFF(t1, t4) As ttt, TIMEDIFF(t2, t3) As qqq,
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TIMEDIFF(t3, t2) As eee, TIMEDIFF(t2, t4) As rrr from test;
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ttt	qqq	eee	rrr
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-744:00:00	NULL	NULL	NULL
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838:59:59	22:58:58	-22:58:58	NULL
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-838:59:59	-22:58:58	22:58:58	NULL
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NULL	26:02:02	-26:02:02	NULL
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00:00:00	-26:02:02	26:02:02	NULL
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NULL	NULL	NULL	NULL
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NULL	NULL	NULL	NULL
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00:00:00	-24:00:00	24:00:00	NULL
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Warnings:
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Warning	1292	Truncated incorrect time value: '26305:01:02'
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Warning	1292	Truncated incorrect time value: '-26305:01:02'
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drop table t1, test;
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select addtime("-01:01:01.01", "-23:59:59.1") as a;
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a
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-25:01:00.110000
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select microsecond("1997-12-31 23:59:59.01") as a;
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a
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10000
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select microsecond(19971231235959.01) as a;
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a
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10000
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select date_add("1997-12-31",INTERVAL "10.09" SECOND_MICROSECOND) as a;
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a
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1997-12-31 00:00:10.090000
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select str_to_date("2003-01-02 10:11:12.0012", "%Y-%m-%d %H:%i:%S.%f");
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str_to_date("2003-01-02 10:11:12.0012", "%Y-%m-%d %H:%i:%S.%f")
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2003-01-02 10:11:12.001200
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select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10'),time('00:00:00') as exp;
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timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')	exp
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-24:00:00	00:00:00
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select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')>time('00:00:00') as exp;
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exp
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0
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select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')<time('00:00:00') as exp;
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exp
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1
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SELECT CAST(time('-73:42:12') AS DECIMAL);
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CAST(time('-73:42:12') AS DECIMAL)
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-734212
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SELECT TIMEDIFF(TIME('17:00:00'),TIME('17:00:00'))=TIME('00:00:00') AS 1Eq,
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TIMEDIFF(TIME('17:59:00'),TIME('17:00:00'))=TIME('00:00:00') AS 1NEq1,
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TIMEDIFF(TIME('18:00:00'),TIME('17:00:00'))=TIME('00:00:00') AS 1NEq2,
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TIMEDIFF(TIME('17:00:00'),TIME('17:00:00'))=     '00:00:00'  AS 2Eq,
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TIMEDIFF(TIME('17:59:00'),TIME('17:00:00'))=     '00:00:00'  AS 2NEq1,
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TIMEDIFF(TIME('18:00:00'),TIME('17:00:00'))=     '00:00:00'  AS 2NEq2,
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TIMEDIFF(TIME('17:00:00'),TIME('17:00:00'))=TIME(0)          AS 3Eq,
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TIMEDIFF(TIME('17:59:00'),TIME('17:00:00'))=TIME(0)          AS 3NEq1,
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TIMEDIFF(TIME('18:00:00'),TIME('17:00:00'))=TIME(0)          AS 3NEq2,
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TIME(0) AS Time0, TIME('00:00:00') AS Time00, '00:00:00' AS Literal0000,
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TIMEDIFF(TIME('17:59:00'),TIME('17:00:00')),
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TIMEDIFF(TIME('17:00:00'),TIME('17:59:00'));
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1Eq	1NEq1	1NEq2	2Eq	2NEq1	2NEq2	3Eq	3NEq1	3NEq2	Time0	Time00	Literal0000	TIMEDIFF(TIME('17:59:00'),TIME('17:00:00'))	TIMEDIFF(TIME('17:00:00'),TIME('17:59:00'))
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1	0	0	1	0	0	1	0	0	00:00:00	00:00:00	00:00:00	00:59:00	-00:59:00
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SELECT sec_to_time(3020399)=TIME('838:59:59');
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sec_to_time(3020399)=TIME('838:59:59')
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1
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SELECT sec_to_time(-3020399)=TIME('-838:59:59');
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sec_to_time(-3020399)=TIME('-838:59:59')
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1
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SELECT sec_to_time(-3020399)='-838:59:59';
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sec_to_time(-3020399)='-838:59:59'
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1
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SELECT time(sec_to_time(-3020399))=TIME('-838:59:59');
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time(sec_to_time(-3020399))=TIME('-838:59:59')
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1
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						|
SELECT time(sec_to_time(-3020399))=TIME('-838:59:58');
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time(sec_to_time(-3020399))=TIME('-838:59:58')
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0
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						|
SELECT maketime(-1,0,1)='-01:00:01';
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maketime(-1,0,1)='-01:00:01'
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1
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						|
SELECT TIME(maketime(-1,0,1))=CAST('-01:00:01' AS TIME);
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TIME(maketime(-1,0,1))=CAST('-01:00:01' AS TIME)
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1
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						|
SELECT maketime(-1,0,1)=CAST('-01:00:01' AS TIME);
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maketime(-1,0,1)=CAST('-01:00:01' AS TIME)
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						|
1
 | 
						|
SELECT maketime(1,0,1)=CAST('01:00:01' AS TIME);
 | 
						|
maketime(1,0,1)=CAST('01:00:01' AS TIME)
 | 
						|
1
 | 
						|
SELECT maketime(1,0,1)=CAST('01:00:02' AS TIME);
 | 
						|
maketime(1,0,1)=CAST('01:00:02' AS TIME)
 | 
						|
0
 |