sqlite
database; ?? ??? ??????
autoincrement
英 [?:'t??nkr?m?nt] US [?:'t?nkr?m?nt]
n.?? ??
SQLite ?? ?? ?? ???
??: SQLite? AUTOINCREMENT? ???? ?? ?? ???? ????? ? ???? ??????. ???? ??? ? ?? ? ??? AUTOINCREMENT ???? ???? ?? ?? ???? ?? ? ????. AUTOINCREMENT ???? ??(INTEGER) ???? ??? ? ????.
??: AUTOINCREMENT ???? ?? ???? ??? ????.
CREATE TABLE table_name(
column1 INTEGER AUTOINCREMENT,
column2 datatype,
column3 datatype,
.....
columnN datatype,
);
SQLite ?? ?? ?? ?
創(chuàng)建的 COMPANY 表如下所示：
sqlite> CREATE TABLE COMPANY(
ID INTEGER PRIMARY KEY AUTOINCREMENT,
NAME TEXT NOT NULL,
AGE INT NOT NULL,
ADDRESS CHAR(50),
SALARY REAL
);
現(xiàn)在，向 COMPANY 表插入以下記錄：
INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ( 'Paul', 32, 'California', 20000.00 );
INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ('Allen', 25, 'Texas', 15000.00 );
INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ('Teddy', 23, 'Norway', 20000.00 );
INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ( 'Mark', 25, 'Rich-Mond ', 65000.00 );
INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ( 'David', 27, 'Texas', 85000.00 );
INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ( 'Kim', 22, 'South-Hall', 45000.00 );
INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ( 'James', 24, 'Houston', 10000.00 );
這將向 COMPANY 表插入 7 個元組，此時 COMPANY 表的記錄如下：
ID NAME AGE ADDRESS SALARY
---------- ---------- ---------- ---------- ----------
1 Paul 32 California 20000.0
2 Allen 25 Texas 15000.0
3 Teddy 23 Norway 20000.0
4 Mark 25 Rich-Mond 65000.0
5 David 27 Texas 85000.0
6 Kim 22 South-Hall 45000.0
7 James 24 Houston 10000.0