Create type and use it in inner query : Select « Object Oriented « Oracle PL/SQL Tutorial

Oracle PL/SQL Tutorial
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Oracle PL/SQL Tutorial » Object Oriented » Select 
32. 11. 9. Create type and use it in inner query
SQL> create or replace type myScalarType as objectcnt number, average number )
  2  /

Type created.

SQL>
SQL> select username, a.data.cnt, a.data.average
  2    from (
  3      select username, (select myScalarTypecount(*), avg(object_id) ) from all_objects b where b.owner = a.username data from all_users a A
  4  /

USERNAME                         DATA.CNT DATA.AVERAGE
------------------------------ ---------- ------------
SYS                                  6520   5009.74064
SYSTEM                                422   6095.87678
OUTLN                                   7   1172.57143
DIP                                     0
TSMSYS                                  2       8606.5
INV15                                   2      16237.5
DBSNMP                                 46   9592.65217
INV10                                   2      16227.5
CTXSYS                                338   9877.92012
XDB                                   334   10800.7485
ANONYMOUS                               0

USERNAME                         DATA.CNT DATA.AVERAGE
------------------------------ ---------- ------------
MDSYS                                 458   11667.2009
HR                                     34      12104.5
FLOWS_FILES                            11   12717.2727
FLOWS_020100                         1085    12813.424
JAVA2S                                530   16254.6849
INV11                                   2      16229.5
INV12                                   2      16231.5
INV13                                   2      16233.5
INV14                                   2      16235.5
PLSQL                                   0
INV16                                   2      16239.5

USERNAME                         DATA.CNT DATA.AVERAGE
------------------------------ ---------- ------------
INV17                                   2      16241.5
INV18                                   2      16243.5
INV19                                   2      16245.5
INV20                                   2      16247.5
DEFINER                                 4      16250.5

27 rows selected.

SQL>
SQL>
SQL>
32. 11. Select
32. 11. 1. Selecting Rows from the Table with object type column
32. 11. 2. Select an individual column object from a table
32. 11. 3. Querying Rows from the object Table
32. 11. 4. SELECTing Only One Column in the Composite
32. 11. 5. COLUMN Formatting in SELECT for Object
32. 11. 6. ORA-00932: inconsistent datatypes: expected REF
32. 11. 7. Query table column with user defined type
32. 11. 8. Use table function to convert type to a 'table'
32. 11. 9. Create type and use it in inner query
32. 11. 10. Use user-defined type to combine query logic
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