Hive Data types and Merging tables , table to table copy

Lab Practice:

[training@localhost ~]$ cat > tmpr.txt
xxxxx1950xxx23xx
xxxxx1950xxx25xx
xxxxx1950xxx24xx
xxxxx1951xxx21xx
xxxxx1951xxx20xx
[training@localhost ~]$
hive> create table raw(line string);
OK
Time taken: 0.077 seconds
hive> load data local inpath 'tmpr.txt' into table raw;
Copying data from file:/home/training/tmpr.txt
Copying file: file:/home/training/tmpr.txt
Loading data to table practice.raw
OK
Time taken: 0.279 seconds
hive> create table tmpr(y int, t int);
OK
Time taken: 0.051 seconds
hive> insert overwrite table tmpr
    >    select substr(line,6,4), substr(line,13,2) from raw;

hive> select * from tmpr
    > ;
OK
1950    23
1950    25
1950    24
1951    21
1951    20
Time taken: 0.101 seconds
hive> create table result(y int, max int, min int);
OK
Time taken: 0.05 seconds
hive> insert overwrite table result
    >   select y, max(t), min(t) from tmpr group by y;

hive> select * from result;
OK
1950    25      23
1951    21      20
Time taken: 0.161 seconds
hive>

___________________________
Merging
____________________________
[training@localhost ~]$ cat > sales1
p1,2000
p2,3000
p1,1000
[training@localhost ~]$ cat > sales2
3000,p1
4000,p1
60000,p2
[training@localhost ~]$ cat > sales3
p1,6000
p2,7000
[training@localhost ~]$ cat > sales4
p1      40000
p2      2000

hive> create table s1(pid string, amt int)
    > row format delimited fields terminated by ',';
OK
Time taken: 0.073 seconds
hive> create table s2(amt int, pid string)
    > row format delimited fields terminated by ',';
OK
Time taken: 0.044 seconds
hive> create table s3(pid string, amt int)        
    > row format delimited fields terminated by '\t';
OK
Time taken: 0.044 seconds
hive> load data local inpath 'sales1' into table s1;
Copying data from file:/home/training/sales1
Copying file: file:/home/training/sales1
Loading data to table practice.s1
OK
Time taken: 0.119 seconds
hive> load data local inpath 'sales3' into table s1;
Copying data from file:/home/training/sales3
Copying file: file:/home/training/sales3
Loading data to table practice.s1
OK
Time taken: 0.161 seconds
hive> load data local inpath 'sales2' into table s2;
Copying data from file:/home/training/sales2
Copying file: file:/home/training/sales2
Loading data to table practice.s2
OK
Time taken: 0.161 seconds
hive> load data local inpath 'sales4' into table s3;
Copying data from file:/home/training/sales4
Copying file: file:/home/training/sales4
Loading data to table practice.s3
OK
Time taken: 0.143 seconds
hive> create table sales like s1;
OK
Time taken: 0.061 seconds
hive> insert overwrite table sales
    >   select * from (
    >    select pid, amt from s1
    >       union all
    >    select pid, amt from s2
    >      union all
    >   select pid, amt from s3 ) s ;

hive> select * from sales;
OK
p1      2000
p2      3000
p1      1000
p1      6000
p2      7000
p1      3000
p1      4000
p2      60000
p1      40000
p2      2000
Time taken: 0.11 seconds
hive>
[training@localhost ~]$ hadoop fs -ls /user/hive/warehouse/practice.db/sales
Found 1 items
-rw-r--r--   1 training supergroup         82 2015-04-19 02:41 /user/hive/warehouse/practice.db/sales/000000_0
[training@localhost ~]$ hadoop fs -cat /user/hive/warehouse/practice.db/sales/000000_0
p1,2000
p2,3000
p1,1000
p1,6000
p2,7000
p1,3000
p1,4000
p2,60000
p1,40000
p2,2000
[training@localhost ~]$