SQLite单列更新查询不起作用

Question

我的UpdateRow函数不起作用。有人可以帮忙吗？

public boolean UpdateRow(String date ,String timeOut) {
    SQLiteDatabase db = this.getWritableDatabase();
    db.execSQL("UPDATE " + TABLE_NAME + " SET " + COL_3 + "=" + timeOut + "WHERE " + COL_1 + "=" + date);
}

谢谢。

Answer 1

我认为您编写的查询缺少WHERE子句和COL_1之间的空格。该行应编写如下。

db.execSQL("UPDATE " + TABLE_NAME 
    + " SET " + COL_3 + " = " + timeOut 
    + " WHERE " + COL_1 + " = " + date
);

Answer 2

date前后的撇号和列之间的间隔：

db.execSQL("UPDATE " + TABLE_NAME + " SET " + COL_3 + "=" + timeOut + " WHERE " + COL_1 + "='" + date + "'");

如果timeOut是TEXT，那么它也需要加撇号：

db.execSQL("UPDATE " + TABLE_NAME + " SET " + COL_3 + "='" + timeOut + "' WHERE " + COL_1 + "='" + date + "'");