Summary of a table in SQL

Question

I need a query to print summary of table in a single query without using PLSQL..
table list
with t as
select 1 table_number , 't1' table_name from dual
union all
select 2 table_number , 't2' table_name from dual
union all
select 2 table_number , 't3' table_name from dual
select * from t;
Table1
with t1 as
select 'US' country_code  , 'SYSTEM1' source, 1 emp_num , 'Not Processed' status from dual
union all
select 'India' country_code  , 'SYSTEM1' source, 2 emp_num , 'Valid' status from dual
union all
select 'India' country_code  , 'SYSTEM2' source, 3 emp_num , 'Error' status from dual
union all
select 'India' country_code  , 'SYSTEM2' source, 4 emp_num , 'Valid' status from dual
select * from t1;
i need a query where with input parameter as table_number...
for eg 1 .. i want the output should be grouped by table_name ,country_code and  source
output like
table_name country_code source total_records valid_records error_records not_processed_records valid_records_percentage
t1         India       SYSTEM1  1             1             0              0                     100
t1         India       SYSTEM2  2             1             1              0                     50
t1         US          SYSTEM1  1             0             0              1                     0
Total                                     4             2             1              1                     50                    
and i need total for these in last record

Answer 1

Are you looking to get the table name dynamically? In that case try this.
SQL> select * from t;
TABLE_NUMBER TABLE_NAME
           1 t1
           2 t2
           2 t3
SQL> select * from t1;
COUNTRY_CODE  SOURCE     EMP_NUM STATUS
US            SYSTEM1          1 Not Processed
India         SYSTEM1          2 Valid
India         SYSTEM2          3 Error
India         SYSTEM2          4 Valid
SQL> select case when grouping_id(table_name)
  2                 + grouping_id(country_code)
  3                 + grouping_id(source_) = 0 then table_name
  4              else 'Total'
  5         end table_name
  6       , country_code
  7       , source_
  8       , count(*) total_record
  9       , count(decode(status, 'Not Processed', 1)) not_processed
10       , count(decode(status, 'Valid', 1)) valid
11       , count(decode(status, 'Error', 1)) error_
12    from (
13            select t.table_name
14                 , t1.country_code
15                 , t1.source_
16                 , t1.emp_num
17                 , t1.status
18              from (
19                      select table_name
20                           , dbms_xmlgen.getxmltype('select * from ' || table_name) xml_output
21                        from t
22                       where table_number = 1
23                   ) t
24                 , xmltable
25                   (
26                      '/ROWSET/ROW' passing t.xml_output
27                      columns
28                      country_code varchar2(100) path 'COUNTRY_CODE',
29                      source_      varchar2(100) path 'SOURCE',
30                      emp_num      number        path 'EMP_NUM',
31                      status       varchar2(100) path 'STATUS'
32                   ) t1
33         )
34   group
35      by rollup
36         (
37            table_name
38          , country_code
39          , source_
40         )
41  having grouping_id(table_name)
42       + grouping_id(country_code)
43       + grouping_id(source_) in (0, 3);
TABLE_NAME  COUNTRY_CODE  SOURCE_    TOTAL_RECORD NOT_PROCESSED      VALID     ERROR_
t1          US            SYSTEM1               1             1          0          0
t1          India         SYSTEM1               1             0          1          0
t1          India         SYSTEM2               2             0          1          1
Total                                           4             1          2          1
SQL>
For this to work all the table that are passed must have the same structure. But then comes the question why do you have different table with same structure