SQLite支持的数据类型(日期函数)

SQLite驱动支持的SQL 列类型
类型描述
TINYBLOB, BLOB, MEDIUMBLOB, LONGBLOB, BYTEA
不限制长度的字符串类型. 二进制数据必须安全地编码存储, 见text类型.
CHAR(), VARCHAR(), TINYTEXT, TEXT, MEDIUMTEXT, LONGTEXT
不限制长度的字符串类型. 不会被截断或者填充
ENUM
不限制长度的字符串类型. 不像 MySQL, 使用 ENUM代替 VARCHAR不会节省存储空间.
SET
不限制长度的字符串类型. In contrast to MySQL, the input is not checked against the list of allowed values.
YEAR
不限制长度的字符串类型. MySQL 用1个字节 存储 2 个或者 4 个数字年份, 而SQLite 存为一个字符串.
TINYINT, INT1, CHAR
A 1 byte type used to store one character, a signed integer between -128 and 127, or an unsigned integer between 0 and 255.
SMALLINT, INT2
2 byte (short) integer type used to store a signed integer between -32768 and 32767 or an unsigned integer between 0 and 65535.
MEDIUMINT
3 byte integer type used to store a signed integer between -8388608 and 8388607 or an unsigned integer between 0 and 16777215.
INT, INTEGER, INT4
4字节 (long)整数类型,用来存储一个有符号的整数,范围从-2147483648 到 2147483647, 或者一个有符号的整数,范围从 0到
4294967295.
BIGINT, INT8, INTEGER PRIMARY KEY
8 字节 (long long) 整型,用来存储有符号的整数,从
-9223372036854775808 到 9223372036854775807 , 或者无符号的整数,从0到 18446744073709551615.  请看下面关于
INTEGER PRIMARY KEY的讨论(哈哈,rowid就是8个字节的整数)
DECIMAL, NUMERIC
A string type of unlimited length used to store floating-point numbers of arbitrary precision.
TIMESTAMP, DATETIME
用来存储日期/时间的不限制长度的字符串类型.
要求的格式是 ‘YYYY-MM-DD HH:MM:SS’,其他的东西被忽略.
DATE
用来存储日期的不限制长度的字符串类型. 要求的格式是
‘YYYY-MM-DD’, 别的格式的东西会被忽略.
TIME
用来存储时间的不限制长度的字符串类型. 要求的格式是 ‘HH:MM:SS’,其他格式的东西会被忽略.
FLOAT, FLOAT4, REAL
A
4 byte floating-point number. The range is -3.402823466E+38 to
-1.175494351E-38, 0, and 1.175494351E-38 to 3.402823466E+38. Please
note that