用另一种方式，还可以使两列主键是唯一的，而使自动递增键是主键。就像这样:https://stackoverflow.com/a/6157337

基本:

CREATE TABLE table1 (
    columnA INTEGER NOT NULL,
    columnB INTEGER NOT NULL,
    PRIMARY KEY (columnA, columnB)
);

如果你的列是其他表的外键(常见情况):

CREATE TABLE table1 (
    table2_id INTEGER NOT NULL,
    table3_id INTEGER NOT NULL,
    FOREIGN KEY (table2_id) REFERENCES table2(id),
    FOREIGN KEY (table3_id) REFERENCES table3(id),
    PRIMARY KEY (table2_id, table3_id)
);

CREATE TABLE table2 (
    id INTEGER NOT NULL,
    PRIMARY KEY id
);

CREATE TABLE table3 (
    id INTEGER NOT NULL,
    PRIMARY KEY id
);

PRIMARY KEY (id, name)不适合我。相反，添加一个约束就可以了。

CREATE TABLE IF NOT EXISTS customer (
    id INTEGER, name TEXT,
    user INTEGER,
    CONSTRAINT PK_CUSTOMER PRIMARY KEY (user, id)
)

下面的代码在SQLite中创建一个主键为2列的表。

解决方案:

CREATE TABLE IF NOT EXISTS users (
    id TEXT NOT NULL, 
    name TEXT NOT NULL, 
    pet_name TEXT, 
    PRIMARY KEY (id, name)
)

自SQLite 3.8.2版本以来，显式NOT NULL规范的替代方案是“WITHOUT ROWID”规范:[1]

NOT NULL is enforced on every column of the PRIMARY KEY
in a WITHOUT ROWID table.

“WITHOUT ROWID”表具有潜在的效率优势，所以要考虑的一个不那么冗长的替代方案是:

CREATE TABLE t (
  c1, 
  c2, 
  c3, 
  PRIMARY KEY (c1, c2)
 ) WITHOUT ROWID;

例如，在sqlite3提示符下: Sqlite > insert into t values(1,null,3); 错误:NOT NULL约束失败:t.c2

CREATE TABLE something (
  column1 INTEGER NOT NULL,
  column2 INTEGER NOT NULL,
  value,
  PRIMARY KEY ( column1, column2)
);