phoneGap Android - 填充数据库一次"错误处理SQL:1"

Question

我试图避免填充数据库,如果数据库存在,但当我尝试在我的代码中取消此行时,我得到"错误处理SQL:1"

tx.executeSql('DROP TABLE IF EXISTS DEMO');

这是我的整个填充功能

 function populateDB(tx) {
        tx.executeSql('DROP TABLE IF EXISTS DEMO');
        tx.executeSql('CREATE TABLE IF NOT EXISTS DEMO (id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, word TEXT NOT NULL');
        tx.executeSql('INSERT INTO DEMO (id, word) VALUES ("1", "Apple")');
        tx.executeSql('INSERT INTO DEMO (id, word) VALUES ("2", "Orange")');

    }

Answer 1

为什么不用

CREATE TABLE IF NOT EXISTS DEMO  (id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, kword TEXT NOT NULL, eword TEXT NOT NULL, pronoun TEXT NOT NULL, level INTEGER NOT NULL)