Android SQLite CREATE TABLE Syntax Error

Question

当我在我的应用程序中执行SQL时，我收到以下错误：

android.database.sqlite.SQLiteException: near "(": syntax error (code 1): , while compiling: CREATE TABLE IF NOT EXISTS data (id int auto_increment primary key, data_type int default 0, data float not null, time timestamp default now());

导致错误的代码：

@Override
public void onCreate(SQLiteDatabase db){
    db.execSQL("CREATE TABLE IF NOT EXISTS " + DATA_TABLE + " (id int auto_increment primary key, data_type int default 0, data float not null, time timestamp default now());");
}

日志猫

12-11 00:13:55.431  22335-22335/com.shockdoc.ama.shockdoc E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.shockdoc.ama.shockdoc, PID: 22335
    android.database.sqlite.SQLiteException: near "(": syntax error (code 1): , while compiling: CREATE TABLE IF NOT EXISTS data (_id int auto_increment primary key, data_type int default 0, data float not null, time timestamp default now());
            at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
            at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1113)
            at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:690)
            at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
            at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
            at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
            at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1788)
            at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1719)
            at com.shockdoc.ama.shockdoc.DB.onCreate(DB.java:57)
            at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:252)
            at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
            at com.shockdoc.ama.shockdoc.DB.saveStat(DB.java:31)
            at com.shockdoc.ama.shockdoc.MainActivity.onSensorChanged(MainActivity.java:99)
            at android.hardware.SystemSensorManager$SensorEventQueue.dispatchSensorEvent(SystemSensorManager.java:474)
            at android.os.MessageQueue.nativePollOnce(Native Method)
            at android.os.MessageQueue.next(MessageQueue.java:138)
            at android.os.Looper.loop(Looper.java:123)
            at android.app.ActivityThread.main(ActivityThread.java:5356)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
            at dalvik.system.NativeStart.main(Native Method)

我已经通过语法错误检查器运行了该行本身，似乎很好。

Answer 1

错误是由于default now()

尝试使用这个：

CREATE TABLE IF NOT EXISTS data (id int auto_increment primary key, data_type int default 0, data float not null, time timestamp default current_timestamp);

检查这个： SQLite - 默认日期时间字段为当前时间（现在）

希望对您有所帮助。

Answer 2

它必须是您的表名。"数据"是主要用于各种编程语言，查询语言的众多关键字之一......

所以你应该尝试另一个名字。无论如何，"数据"似乎不是一个有意义的名称，程序员应该养成命名变量的好习惯......