SQLite

SQLite3 http://www.sqlite.org/index.html

型
http://www.sqlite.org/datatype3.html
Storage Classes and Datatypes

1. NULL. The value is a NULL value.
2. INTEGER. The value is a signed integer, stored in 1, 2, 3, 4, 6, or 8 bytes depending on the magnitude of the value.
3. REAL. The value is a floating point value, stored as an 8-byte IEEE floating point number.
4. TEXT. The value is a text string, stored using the database encoding (UTF-8, UTF-16BE or UTF-16LE).
5. BLOB. The value is a blob of data, stored exactly as it was input.