錯誤SQLite中創建查詢

Question

一個愚蠢的問題，但我不能在這裏找到一個錯誤...

CREATE TABLE units (_id INTEGER PRIMARY KEY AUTOINCREMENT, group_id INTEGER NOT NULL, unit_name STRING NOT NULL UNIQUE (group_id, unit_name)) 

SQLite的說：

SQLiteManager: Likely SQL syntax error: CREATE TABLE units (_id INTEGER PRIMARY KEY AUTOINCREMENT, group_id INTEGER NOT NULL, unit_name STRING NOT NULL UNIQUE (group_id, unit_name)) 
[ near "(": syntax error ] 
Exception Name: NS_ERROR_FAILURE 
Exception Message: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [mozIStorageConnection.createStatement] 

什麼錯誤？

Answer 1

我的猜測是缺少逗號UNIQUE前：

CREATE TABLE units (
    _id INTEGER PRIMARY KEY AUTOINCREMENT, 
    group_id INTEGER NOT NULL, 
    unit_name STRING NOT NULL, 
    UNIQUE (group_id, unit_name) 
)