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mysql字段类型_MySQL

时间:2021-07-01 10:21:17 帮助过:10人阅读

原网址:http://kimbriggs.com/computers/computer-notes/mysql-notes/mysql-data-types-50.file


Type {storage}NameRangeAttributesDefault
Numeric
{1 byte}
TINYINT[(M)]-128 TO 127
[0 to 255 if UNSIGNED]
AUTO_INCREMENT
UNSIGNED, ZEROFILL,
SERIAL DEFAULT VALUE
NULL
[0 if NOT NULL]
Numeric
{2 bytes}
SMALLINT[(M)]-32,768 to 32,767
[0 to 65,535]
AUTO_INCREMENT,
UNSIGNED, ZEROFILL,
SERIAL DEFAULT VALUE
NULL
[0 if NOT NULL]
Numeric
{3 bytes}
MEDIUMINT[(M)]-8,388,608 to 8,388,607
[0 to 16,777,215]
AUTO_INCREMENT,
UNSIGNED, ZEROFILL,
SERIAL DEFAULT VALUE
NULL
[0 if NOT NULL]
Numeric
{4 bytes}
INT[(M)]-/+2.147E+9
[0 to 4.294E+9]
AUTO_INCREMENT,
UNSIGNED, ZEROFILL,
SERIAL DEFAULT VALUE
NULL
[0 if NOT NULL]
Numeric
{8 bytes}
BIGINT[(M)]-/+9.223E+18
[0 to 18.45E+18]
AUTO_INCREMENT,
UNSIGNED, ZEROFILL,
SERIAL DEFAULT VALUE
NULL
[0 if NOT NULL]
Numeric
{4 or 8}
FLOAT(p)p=0-24 --> "FLOAT"
p=25-53 --> "DOUBLE"
UNSIGNED, ZEROFILLNULL
[0 if NOT NULL]
Numeric
{4 bytes}
FLOAT[(M,D)]Min=+/-1.175E-38
Max=+/-3.403E+38
UNSIGNED, ZEROFILLNULL
[0 if NOT NULL]
Numeric
{8 bytes}
DOUBLE[(M,D)]Min=+/-2.225E-308
Max=+/-1.798E+308
UNSIGNED, ZEROFILLNULL
[0 if NOT NULL]
Numeric
{M+2}
DECIMAL[(M,[D])]
Stored as string
Max Range = DOUBLE range
Fixed point vs. DOUBLE float
UNSIGNED, ZEROFILLNULL
[0 if NOT NULL]
Bit
{8 bytes}
BIT[(M)]Binary. Display by [add zero or converting with BIN()]. M=1-64Prior to 5.03
TINYINT(1) Synonym
NULL
[0 if NOT NULL]
String
{M char's}
CHAR[(M)]M=0-255 Characters, FIXED.
Right padded with spaces.
BINARY, CHARACTER SETNULL
["" if NOT NULL]
String
{M char's1}
VARCHAR(M)M=0-65,535 Characters
M=0-255
BINARY, CHARACTER SETNULL
["" if NOT NULL]
String
{#char's1}
TINYTEXT20-255 CharactersBINARY, CHARACTER SETNULL
["" if NOT NULL]
String
{#char's1}
TEXT20-65,535 Char'sBINARY, CHARACTER SETNULL
["" if NOT NULL]
String
{#char's1}
MEDIUMTEXT20-16,777,215 Char'sBINARY, CHARACTER SETNULL
["" if NOT NULL]
String
{#char's1}
LONGTEXT20-4,294,967,295 Char'sBINARY, CHARACTER SETNULL
["" if NOT NULL]
String
{M bytes}
BINARY[(M)]M=0-255 bytes, FIXED.Global Only
(case sensitive)
NULL
["" if NOT NULL]
String
{M bytes}
VARBINARY(M)0-65,535 bytes
M=0-255
Global Only
(case sensitive)
NULL
["" if NOT NULL]
String
{#bytes1}
TINYBLOB0-255 bytesGlobal Only
(case sensitive)
NULL
["" if NOT NULL]
String
{#bytes1}
BLOB0-65,535 bytesGlobal Only
(case sensitive)
NULL
["" if NOT NULL]
String
{#bytes1}
MEDIUMBLOB0-16,777,215 bytesGlobal Only
(case sensitive)
NULL
["" if NOT NULL]
String
{#bytes1}
LONGBLOB0-4,294,967,295 bytesGlobal Only
(case sensitive)
NULL
["" if NOT NULL]
String
{1-2 bytes}
ENUM2
("A1","A2",...)
Column is exactly 1 of 1-65,535 valuesCHARACTER SETNULL [1st value if NOT NULL]
String
{1-8 bytes}
SET2
("A1","A2",...)
Column is 0 or more values in list of 1-64 membersCHARACTER SETNULL
["" if NOT NULL]
Date & Time
{3 bytes}
DATE"1000-01-01" - "9999-12-31"Global Only
(YYYY-MM-DD)
NULL
["0000-00-00" if NOT NULL]
Date & Time
{8 bytes}
DATETIME"1000-01-01 00:00:00" -
"9999-12-31 23:59:59"
Global Only
(YYYY-MM-DD hh:mm:ss)
NULL ["0000-00-00 00:00:00"
if NOT NULL]
Date & Time
{3 bytes}
TIME"-838:59:59" - "838:59:59"Global Only
(hh:mm:ss)
NULL
["00:00:00" if NOT NULL]
Date & Time
{4 bytes}
TIMESTAMP19700101000000 -
2037+
Global Only
(YYYYMMDDhhmmss)
Current Date & Time
Date & Time
{1 bytes}
YEAR1900 - 2155Global Only
(YYYY)
NULL
["0000" if NOT NULL]

Notes:

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