只有正数条目的int值

Question

我正在尝试创建一个表,我只能为INT提供正值,我该怎么做？

CREATE TABLE Ingredients(
IngredientID    INTEGER     PRIMARY KEY     NOT NULL,
IngredientName  VARCHAR(255),
IngredientClassID   SMALLINT    NOT NULL,
MeasureAmountID      SMALLINT    NOT NULL
);

Answer 1

试试这个...

CREATE TABLE Ingredients(
IngredientID    INTEGER     PRIMARY KEY,
IngredientName  VARCHAR(255),
IngredientClassID   SMALLINT    NOT NULL,
MeasureAmountID      SMALLINT    NOT NULL,
CHECK (IngredientClassID>0),
CHECK (MeasureAmountID>0)

);