Numeric
|
Types of
|
size
|
Range (signed)
|
Range (unsigned)
|
use
|
|
TINYINT
|
1 byte
|
(-128，127)
|
(0，255)
|
Small integer values
|
|
SMALLINT
|
2 bytes
|
(-32 768，32 767)
|
(0，65 535)
|
Large integer values
|
|
MEDIUMINT
|
3 bytes
|
(-8 388 608，8 388 607)
|
(0，16 777 215)
|
Large integer values
|
|
INT or INTEGER
|
4 bytes
|
(-2 147 483 648，2 147 483 647)
|
(0，4 294 967 295)
|
Large integer values
|
|
BIGINT
|
8 bytes
|
(-9 233 372 036 854 775 808，9 223 372 036 854 775 807)
|
(0，18 446 744 073 709 551 615)
|
Maximum integer value
|
|
FLOAT
|
4 bytes
|
(E + -3 402 823 466 494 351 38,1.175 E-38) 0, (E-1175 494 351 823 466 351 E 38,3.402 + 38)
|
0 (E-1175 494 351 823 466 38,3.402 E + 38)
|
Single-precision
floating-point value |
|
DOUBLE
|
8 bytes
|
(1,797 693 134 862 315 7 E + 308,2.225 073 858 507 201 4 E-308) 0 (2,225 073 858 507 201 4 E-308,1.797 693 134 862 315 7 E + 308)
|
0 (2,225 073 858 507 201 4 E-308,1.797 693 134 862 315 7 E + 308)
|
Double-precision
floating-point values |
|
DECIMAL
|
Of DECIMAL (M, D), if M> D, M + 2 is otherwise D + 2
|
Depending on the value of M and D
|
Depending on the value of M and D
|
Small value
|
Character Types
|
CHAR
|
0-255 bytes
|
Fixed-length string
|
|
VARCHAR
|
0-255 bytes
|
Variable-length strings
|
|
TINYBLOB
|
0-255 bytes
|
No more than 255 characters in binary string
|
|
TINYTEXT
|
0-255 bytes
|
Short text strings
|
|
BLOB
|
0-65535 bytes
|
Long text data in binary form
|
|
TEXT
|
0-65535 bytes
|
Long text data
|
|
MEDIUMBLOB
|
Bytes 0-16777215
|
Binary text data in the form of medium length
|
|
MEDIUMTEXT
|
Bytes 0-16777215
|
Medium length text data
|
|
LOGNGBLOB
|
0-4294967295 bytes
|
Great text data in binary form
|
|
LONGTEXT
|
0-4294967295 bytes
|
Great text data
|
Enumerations
|
Types of
|
Size (bytes) |
The maximum number of members
|
|
ENUM
|
64
|
65535
|
|
SET
|
64
|
64
|
Time Type
|
Types of
|
Size (bytes) |
range
|
format
|
use
|
|
DATE
|
3
|
1000-01-01/9999-12-31
|
YYYY-MM-DD
|
Date values
|
|
TIME
|
3
|
'-838:59:59'/'838:59:59'
|
HH:MM:SS
|
Time value or duration
|
|
YEAR
|
1
|
1901/2155
|
YYYY
|
Year Value
|
|
DATETIME
|
8
|
1000-01-01 00:00:00/9999-12-31 23:59:59
|
YYYY-MM-DD HH:MM:SS
|
Date and time value mixing
|
|
TIMESTAMP
|
8
|
1970-01-0100: 00: 00/2037 sometime years
|
YYYYMMDD HHMMSS
|
Mixing date and time value, the time stamp
|