我正在使用sqldf从数据库中的表中获取一些列，但结果没有显示列名，这就是我得到的内容。
我的代码如下：
z<-sqldf("select (gid, longitude, latitude, acq_date) from kalimantan limit 10" )
和结果
row 1
(1,112.544000000000000,-2.145000000000000,39448) 2
(2,111.617000000000000,-2.720000000000000,39448) 3
(3,110.277000000000000,-2.554000000000000,39448) 4
(4,117.037000000000010,-0.553000000000000,39449) 5
(5,117.583000000000000,-0.462000000000000,39454) 6
(6,110.292000000000000,-1.517000000000000,39455) 7
(7,111.517000000000000,-2.399000000000000,39455) 8
(8,110.285000000000000,-2.660000000000000,39455) 9
(9,109.527000000000000,-0.219000000000000,39455) 10
(10,110.756000000000000,-2.727000000000000,39457)
我需要的是
gid | longitude | latitude | date
1 112.544000000000000 -2.145000000000000,39448) 1
2 111.617000000000000 -2.720000000000000,39448) 2
3 110.277000000000000 -2.554000000000000,39448) 3
4 117.037000000000010 -0.553000000000000,39449) 4
5 117.583000000000000 -0.462000000000000,39454) 5
6 110.292000000000000 -1.517000000000000,39455) 6
7 111.517000000000000 -2.399000000000000,39455) 7
8 110.285000000000000 -2.660000000000000,39455) 8
9 109.527000000000000 -0.219000000000000,39455) 9
10 110.756000000000000 -2.727000000000000,39457) 10