Delete statement that uses a sub-select with the statement in the cursor

Question

Hi all,
How to write write a delete statement that uses a sub-select with the statement in the cursor?
CURSOR excluded_dates IS         
       SELECT TO_TIMESTAMP(report_parameter_value, in_date_format_mask)
      INTO my_current_date_time
      FROM report_parameters
     WHERE report_parameters.report_parameter_id    = in_report_parameter_id
       AND report_parameters.report_parameter_group = 'DATE_TIME'
       AND report_parameters.report_parameter_name  = 'EXCLUDED_DATE';
OPEN excluded_dates;
  LOOP
    FETCH excluded_dates INTO my_excluded_date;
    EXIT WHEN excluded_dates%NOTFOUND;
    DELETE FROM edr_rpt_tmp_inclusion_table
    WHERE TO_CHAR(date_time, 'mm/dd/yyyy') = TO_CHAR(my_excluded_date, 'mm/dd/yyyy');
  END LOOP;
  CLOSE excluded_dates;Thanks

Answer 1

Hi,
In such case I think is better to create a view an perform the delete using it. Example (using HR schema):
Connected to Oracle Database 10g Express Edition Release 10.2.0.1.0
Connected as hr
SQL> create or replace view v_employees as select * from employees where first_name like 'J%';
View created
SQL> select * from v_employees;
EMPLOYEE_ID FIRST_NAME           LAST_NAME                 EMAIL                     PHONE_NUMBER         HIRE_DATE   JOB_ID         SALARY COMMISSION_PCT MANAGER_ID DEPARTMENT_ID
        110 John                 Chen                      JCHEN                     515.124.4269         28/09/1997  FI_ACCOUNT    8200,00                       108           100
        112 Jose Manuel          Urman                     JMURMAN                   515.124.4469         07/03/1998  FI_ACCOUNT    7800,00                       108           100
        125 Julia                Nayer                     JNAYER                    650.124.1214         16/07/1997  ST_CLERK      3200,00                       120            50
        127 James                Landry                    JLANDRY                   650.124.1334         14/01/1999  ST_CLERK      2400,00                       120            50
        131 James                Marlow                    JAMRLOW                   650.124.7234         16/02/1997  ST_CLERK      2500,00                       121            50
        133 Jason                Mallin                    JMALLIN                   650.127.1934         14/06/1996  ST_CLERK      3300,00                       122            50
        139 John                 Seo                       JSEO                      650.121.2019         12/02/1998  ST_CLERK      2700,00                       123            50
        140 Joshua               Patel                     JPATEL                    650.121.1834         06/04/1998  ST_CLERK      2500,00                       123            50
        145 John                 Russell                   JRUSSEL                   011.44.1344.429268   01/10/1996  SA_MAN       14000,00           0,40        100            80
        156 Janette              King                      JKING                     011.44.1345.429268   30/01/1996  SA_REP       10000,00           0,35        146            80
        176 Jonathon             Taylor                    JTAYLOR                   011.44.1644.429265   24/03/1998  SA_REP        8600,00           0,20        149            80
        177 Jack                 Livingston                JLIVINGS                  011.44.1644.429264   23/04/1998  SA_REP        8400,00           0,20        149            80
        181 Jean                 Fleaur                    JFLEAUR                   650.507.9877         23/02/1998  SH_CLERK      3100,00                       120            50
        186 Julia                Dellinger                 JDELLING                  650.509.3876         24/06/1998  SH_CLERK      3400,00                       121            50
        189 Jennifer             Dilly                     JDILLY                    650.505.2876         13/08/1997  SH_CLERK      3600,00                       122            50
        200 Jennifer             Whalen                    JWHALEN                   515.123.4444         17/09/1987  AD_ASST       4400,00                       101            10
16 rows selected
SQL> delete from v_employees where hire_date >= to_date('01/06/1998', 'dd/mm/yyyy');
2 rows deleted
SQL> regards,