创建数据库 #!/bin/bash sqlite3 example.db <<EOF -- 创建表 CREATE TABLE users ( id INTEGER PRIMARY KEY, name TEXT NOT NULL, email TEXT UNIQUE NOT NULL, a
1. 创建数据库连接 importsqlite3# 创建数据库连接conn=sqlite3.connect('example.db') 1. 2. 3. 4. 2. 创建学生表和成绩表 # 创建学生表conn.execute('''CREATE TABLE 学生 (id INTEGER PRIMARY KEY AUTOINCREMENT, 姓名TEXT, 年龄INTEGER, 性别TEXT, 地址TEXT);''')# 创建成绩表conn.execute('''CRE...
3.1 建立数据库 C:\sqlite-3_6_11> sqlite3.exe dbname.db //sqlite3.exe后面跟数据库文件名3.2 创建数据表 sqlite> create table users(userid varchar(20) PRIMARY KEY, age int, birthday datetime);3.3 添加记录 insert into users values('张三',20,'1989-05-04');3.4 查询记录 select * from us...
SQLITE_ENABLE_UPDATE_DELETE_LIMIT SQLITE_OMIT_ALTERTABLE SQLITE_OMIT_ANALYZE SQLITE_OMIT_ATTACH SQLITE_OMIT_AUTOINCREMENT SQLITE_OMIT_CAST SQLITE_OMIT_COMPOUND_SELECT SQLITE_OMIT_EXPLAIN SQLITE_OMIT_FOREIGN_KEY SQLITE_OMIT_PRAGMA SQLITE_OMIT_REINDEX SQLITE_OMIT_SUBQUERY SQLITE_OMIT_TEMPDB SQLITE_OMIT_...
}// enable foreign keys support (defaultly disabled; if disabled then foreign key constraints are not enforced)$version= SQLite3::version();if($version['versionNumber'] >='3006019') {$this->query("PRAGMA foreign_keys = ON"); }
Each database connection can always turn enforcement of foreign key constraints on and off and run-time using the foreign_keys pragma. Enforcement of foreign key constraints is normally off by default, but if this compile-time parameter is set to 1, enforcement of foreign key constraints will ...
PRIMARY KEY ("uid") ); PRAGMA foreign_keys = true; 说明:在运行demo之前,先把建表语句拿到sqlite的客户端执行一下。 最后,测试; 控制台打印结果如下图所示: image.png 浏览器执行结果如下图所示: image.png image.png 写这个demo的时候,也遇到很多问题,在此记录一下: ...
--约束 --非空约束 --主键约束(PK)-- primary keyconstraint主键的值不能为空 --唯一约束(UQ)--uniqueconstraint唯一允许为空,但只能出现一次--默认约束(DF)--defaultconstraint默认值 --检查约束(CK)checkconstraint范围以及格式限制 --外键约束(FK)foreign key ...
in add_foreign_key self.db.add_foreign_keys([(self.name, column, other_table, other_column)]) File "/Users/markd/Library/Python/3.8/lib/python/site-packages/sqlite_utils/db.py", line 1019, in add_foreign_keys cursor.execute( sqlite3.OperationalError: table sqlite_master may not be modi...
这是因为你在ForeignKey中遗漏了on_delete，这在新的Django版本中是必须的。