NULL，INTEGER，REAL，TEXT，BLOB（如何输入就如何存储）
| Example Typenames From The CREATE TABLE Statement or CAST Expression |
Resulting Affinity |
|---|---|
| INT INTEGER tinyint SMALLINT MEDIUMINT BIGINT UNSIGNED BIG INT INT2 INT8 |
INTEGER |
| CHaraCTER(20) VARCHAR(255) varying CHaraCTER(255) NCHAR(55) NATIVE CHaraCTER(70) NVARCHAR(100) TEXT CLOB |
TEXT |
| BLOB no datatype specified |
NONE |
| REAL DOUBLE DOUBLE PRECISION FLOAT |
REAL |
| NUMERIC DECIMAL(10,5) BOOLEAN DATE DATETIME |
NUMERIC |
