小编Ahl*_*lam的帖子

point和之间有什么区别multipoint？linestring和multilinestring？polygon和multipolygon？在PostGIS中

定义"多"形状背后的秘诀是什么？

我正在尝试更改定义如下的SQLite表:

    String CREATE_TABLE="CREATE TABLE IF NOT EXISTS " + tab_NAME + " ("
                            + row_ID + " INTEGER PRIMARY KEY , "
                            + row_NAME + " TEXT, "
                            + row_EMAIL + " TEXT, "
                            + row_WEBSITE + " TEXT, "
                            + row_TELEPHONE1 + " TEXT, "
                            + row_TELEPHONE2 + " TEXT, "
                            + row_TELEPHONE3 + " TEXT, "
                            + row_TELEPHONE4 + " TEXT, "
                            + row_TELEPHONE5 + " TEXT);";
        db_name.execSQL(CREATE_TABLE);

        String newTab="CREATE TABLE IF NOT EXISTS temp ("
                + row_ID …