在配置单元表中导入系统名称，系统当前日期，时间

Question

I want to create a table sample and it should have 9 columns and the data which I am loading has only 6 columns.I want to add my Linux system name, Linux current system date, Linux current time into my first three columns and then load the rest of the data into their respective columns.Then my final table should look like this.could anyone help me, please NOTE: Here the sys_name|sys_date|sys_time| columns data is imported from the Linux system and for the rest of the column's data is from actual data from data set.

select * from sample;

sys_name|sys_date|sys_time|column4|column5|column6|column7|column8|column9|
linux   2017-03-09 21:00 data4   data5    data6   data7  data8     data9
linux   2017-03-09 22:00 data4,4 data5,5  data6,6 data7,7 data8,8  data9,9

Answer 1

使用Alter table在#sample添加列

 ALTER TABLE #sample ADD sys_name VARCHAR(20) NULL, sys_date Date,some_name varchar(20) NULL; 

Answer 2

I'm assuming you have the columns from column4 to column9 in a separate table (If not, create an external table on top of the data) in that case, you can hardcode the first three columns in a select statment and load the data into your new table using the below "insert using select " statement

create table sample(
sysname string,
sysdate date,
some_name string,
column4 string,
.
.
column9 string)
rowfromat delimited
fields terminated by '|'
stored as textfile;

Insert into table sample select 'linux' as sysname, date(current_timestamp) as sys_date, 'name' as some_name, col4, col5, col6, col7, col8, col9 from original_table