我對SQLite數據庫

Question

上自動增量查詢我有以下數據庫：

CREATE TABLE QUESTION (
    QUES_ID INTEGER AUTO INCREMENT, 
    TOPIC_ID INTEGER NOT NULL, 
    QUESTION_DESC TEXT NOT NULL, 
    CHOICE_A TEXT, 
    CHOICE_B TEXT, 
    CHOICE_C TEXT, 
    CHOICE_D TEXT, 
    PRIMARY KEY (QUES_ID,TOPIC_ID), 
    FOREIGN KEY (TOPIC_ID) REFERENCES TOPIC(TOPIC_ID) 
); 

當我插入信息這樣的...

INSERT INTO 
    QUESTION (TOPIC_ID,QUESTION_DESC,CHOICE_A,CHOICE_B,CHOICE_C,CHOICE_D) 
VALUES 
    (1,'Blue or blue?','red?','yellow?','black?','yellow again?'); 

我得到下面的結果，在ques_id沒有分配！

QUES_ID  TOPIC_ID QUESTION_DESC CHOICE_A CHOICE_B CHOICE_C CHOICE_D  
---------- --------- ------------- --------- --------- --------- ------------- 
      1   Blue or blue? red?  yellow? black? yellow again? 

Answer 1

每SQLite FAQ：

A column declared INTEGER PRIMARY KEY will autoincrement.

所以，你的DDL語句應該看起來更像是：

CREATE TABLE QUESTION (
    QUES_ID INTEGER PRIMARY KEY, 
    TOPIC_ID INTEGER NOT NULL, 
    QUESTION_DESC TEXT NOT NULL, 
    CHOICE_A TEXT, 
    CHOICE_B TEXT, 
    CHOICE_C TEXT, 
    CHOICE_D TEXT, 
    -- the primary key must be QUES_ID 
    -- if you want it to auto-increment 
    -- so if you really want you can add 
    -- a unique constraint here 
    CONSTRAINT qt UNIQUE (QUES_ID, TOPIC_ID), 
    FOREIGN KEY (TOPIC_ID) REFERENCES TOPIC (TOPIC_ID) 
); 

Answer 2

嘗試QUES_ID AUTO_INCREMENT

，真的，如果你總是希望它在那裏使它

QUES_ID MEDIUMINT NOT NULL AUTO_INCREMENT 

Answer 3

您需要： QUES_ID INTEGER PRIMARY KEY AUTOINCREMENT

Answer 4

嘗試這樣的插入數據：

INSERT INTO QUESTION values (1,'Blue or blue?','red?','yellow?','black?','yellow again?'); 

由於您沒有在您的查詢中提及自動增量列，您也沒有提及NOT NULL，因此它會跳過爲該列輸入數據。