Value range of various MySQL fields in the database _ MySQL

Source: Internet
Author: User
TINYINT-128 TINYINT.
  
-128-127
  
TINYINT UNSIGNED
  
0-255
  
SMALLINT
  
-32768-32767
  
SMALLINT UNSIGNED
  
0-65535
  
MEDIUMINT
  
-8388608-8388607
  
MEDIUMINT UNSIGNED
  
0-16777215
  
INT or INTEGER
  
-2147483648-2147483647
  
Int unsigned or INTEGER UNSIGNED
  
0-4294967295
  
BIGINT
  
-9223372036854775808-9223372036854775807
  
BIGINT UNSIGNED
  
0-18446744073709551615
  
FLOAT
  
-3.402823466E + 38--1.175494351E-38
  
0
  
1.175494351E-38-3.402823466E + 38
  
DOUBLE, double precision, or REAL
  
-1.7976931348623157E + 308--2.225074255072014e-308
  
0
  
2.225074255072014e-308-1.7976931348623157E + 308
  
DECIMAL [(M, [D])] or NUMERIC (M, D)
  
It is determined by M (the length of the entire number, including the decimal point, the number of digits on the left of the decimal point, the number of digits on the right of the decimal point, but not the negative number) and D (the number of digits on the right of the decimal point, M is 10 by default, D is 0 by default
  
DATE
  
1000-01-01-9999-12-31
  
DATETIME
  
1000-01-01 00:00:00-9999-12-31 23:59:59
  
TIMESTAMP
  
2037 00:00:00-one day in December (I don't know which day, huh, huh)
  
TIME
  
-838: 59: 59' to 838: 59: 59
  
YEAR [(2 | 4)]
  
The default format is 4 bits. the value range of 4 bits is 1901-1970, 2069, and the value range of 2 bits is 70-69)
  
CHAR (M) [BINARY] or NCHAR (M) [BINARY]
  
M ranges from 1 to 255. if BINARY is not available, it is case-insensitive. NCHAR indicates that the default character set is used. fill in space in the database, but the space at the end of the removal will be automatically removed.
  
[NATIONAL] VARCHAR (M) [BINARY]
  
M ranges from 1 to 255. spaces at the end of the database will be removed automatically.
  
TINYBLOB or TINYTEXT
  
255 (2 ^ 8-1) characters
  
BLOB or TEXT
  
65535 (2 ^ 16-1) characters
  
MEDIUMBLOB or MEDIUMTEXT
  
16777215 (2 ^ 24-1) characters
  
LONGBLOB or LONGTEXT
  
4294967295 (2 ^ 32-1) characters
  
ENUM ('value1', 'value2 ',...)
  
There can be a total of 65535 different values
  
SET ('value1', 'value2 ',...)

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