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DATETIME, DATE TIMESTAMP MySQL

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DATETIME, DATE TIMESTAMP . .

DATETIME , , . MySQL DATETIME YYYY-MM-DD HH:MM:SS. : 1000-01-01 00:00:00 9999-12-31 23:59:59.

DATE , , . MySQL DATE YYYY-MM-DD. : 1000-01-01 9999-12-31.

TIMESTAMP , , INSERT UPDATE . TIMESTAMP. , , . TIMESTAMP, .

TIMESTAMP :

  • INSERT LOAD DATA INFILE;
  • UPDATE . , UPDATE, , , TIMESTAMP, , , MySQL ;
  • TIMESTAMP NULL.

TIMESTAMP . NULL NOW().

TIMESTAMP , , . TIMESTAMP. , , , , TIMESTAMP , , , :

  • MySQL , . ;
  • , TIMESTAMP .

TIMESTAMP . .

, MySQL TIMESTAMP, , . 5.2. TIMESTAMP 14 , :

5.2. TIMESTAMP.

TIMESTAMP (14) YYYYMMDDHHMMSS
TIMESTAMP (12) YYMMDDHHMMSS
TIMESTAMP (10) YYMMDDHHMM
TIMESTAMP (8) YYYYMMDD
TIMESTAMP (6) YYMMDD
TIMESTAMP (4) YYMM
TIMESTAMP (2) YY

TIMESTAMP , . , , .

: 6, 8, 12 14. , , 0 14, 14. 1 13 .

DATETIME, DATE TIMESTAMP, :

  • YYYY-MM-DD HH:MM:SS YY-MM-DD HH:MM:SS. : . , 98-12-31 11:30:45, 98.12.31 11+30+45, 98/12/31 11*30*45 98@12@31 11305 ;
  • YYYY-MM-DD YY-MM-DD. : , 98-12-31, 98.12.31, 98/12/31 98@12@31 ;
  • YYYYMMDDHHMMSS YYMMDDHHMMSS, , . , 19970523091528 970523091528 1997-05-23 09:15:28, 971122129015 ( ) 0000-00-00 00:00:00;
  • YYYYMMDD YYMMDD, , . , 19970523 970523
  • 1997-05-23, 971332 ( ) 0000-00-00;
  • YYYYMMDDHHMMSS YYMMDDHHMMSS, , . , 19830905132800 830905132800 1983-09-05 13:28:00;
  • YYYYMMDD YYMMDD , . , 19830905 830905 1983-09-05;
  • , , DATETIME, DATE TIMESTAMP, NOW(), CURRENT_DATE.

DATETIME, DATE TIMESTAMP (0000-00-00 00:00:00, 0000-00-00 00000000000000 ).

, , , , , 10: 1979-6-9, 1979-06-09. , , , , , , 10: 1979-10-30 1:2:3 , 1979-10-30 01:02:03.

, , , 8,12 14 . 8 14 , , YYYYMMDD YYYYMMDDHHMMSS, 4 . 12 , , YYMMDD YYMMDDHHMMSS, 2 . , , .

, , , . , . , 9903, , 1999 , , MySQL . , 99 03, , . --.

TIMESTAMP , , , . :

  • , , TIMESTAMP(4) TIMESTAMP(2). , , 0;
  • ALTER TABLE ( ), TIMESTAMP, , . ( ), - !
  • TIMESTAMP , , . ;
  • TIMESTAMP , UNIX_TIMESTAMP() . . HOUR() SECOND(), TIMESTAMP ( , , ). , TIMESTAMP , 10. , .

. , :

  • DATE DATETIME TIMESTAMP, , 00:00:00 , DATE ;
  • DATE DATETIME TIMESTAMP, , DATE ;
  • , , DATETIME, DATE TIMESTAMP , . , . TIMESTAMP , 1970, , 2037. , 1968-01-01, DATETIME DATE, TIMESTAMP 0. , !

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