Is not null and null join

Question

Hi, I am trying to properly display a list of tasks for a project however without a join to the project number (which I was aware of) and the employee table, I get over 500 results.
The task can be created without a employee assigned to it so therefore the page does not require the field to be filled in.
Here is the SQL code, any does anyone have any ideas?
select
    pd.pk_proj_detail_id    "Task Number",
    pd.task_title           "Task Title",
    pd.DETAIL_STATUS        "Task Status",
    pm.name                 "Associated Project",
    pps.last_name||', '||pps.first_name||', '||pps.middle_initial||'.' "Assigned Employee",
    pd.TRACKIT_NUMBER       "TrackIt! Number",
    pd.CREATEBY_DATE        "Date Entered",
    pd.DATE_BEGIN           "Date Began",
    pd.ESTIMATED_DATE       "Estimated Completion Date",
    pd.DATE_END             "Date Completed"
from
    PROTRAC_DETAIL pd,
    protrac_master pm,
    cobr.vw_pps_payroll pps,
    resources r
where
    pd.fk_proj_master_id = pm.PK_PROJ_MASTER_ID
    and r.fk_master_id = pm.PK_PROJ_MASTER_ID
    and (r.emp_id = pps.emple_no
        or r.emp_id is null)

Answer 1

It's 10g r2 with Application Express 3.1.0.00.32
This is the tasks (detail) table
ALTER TABLE PROTRAC_DETAIL
DROP PRIMARY KEY CASCADE;
DROP TABLE PROTRAC_DETAIL CASCADE CONSTRAINTS;
CREATE TABLE PROTRAC_DETAIL
  PK_PROJ_DETAIL_ID      NUMBER                 NOT NULL,
  FK_PROJ_MASTER_ID      NUMBER,
  TRACKIT_NUMBER         NUMBER,
  DETAIL_DESCRIPTION     VARCHAR2(4000 CHAR),
  DETAIL_STATUS          VARCHAR2(19 CHAR),
  DETAIL_STATUS_COMMENT  VARCHAR2(4000 CHAR),
  DATE_BEGIN             DATE,
  DATE_END               DATE,
  ESTIMATED_DATE         DATE,
  CREATEBY_DATE          DATE,
  CREATEBY_USER          VARCHAR2(50 CHAR),
  LASTMOD_DATE           DATE,
  LASTMOD_USER           VARCHAR2(50 CHAR),
  TASK_TITLE             VARCHAR2(100 CHAR)
TABLESPACE DEVPROTRAC_DATA
PCTUSED    0
PCTFREE    10
INITRANS   1
MAXTRANS   255
STORAGE    (
            INITIAL          64K
            MINEXTENTS       1
            MAXEXTENTS       2147483645
            PCTINCREASE      0
            BUFFER_POOL      DEFAULT
CREATE UNIQUE INDEX PROTRAC_DETAIL_PK ON PROTRAC_DETAIL
(PK_PROJ_DETAIL_ID)
TABLESPACE DEVPROTRAC_DATA
PCTFREE    10
INITRANS   2
MAXTRANS   255
STORAGE    (
            INITIAL          64K
            MINEXTENTS       1
            MAXEXTENTS       2147483645
            PCTINCREASE      0
            BUFFER_POOL      DEFAULT
CREATE OR REPLACE TRIGGER BUI_PROTRAC_DETAIL
before insert or update
on PROTRAC_DETAIL
referencing new as New old as Old
for each row
begin
    if inserting then
        select users_seq.nextval, sysdate, apex_application.g_user
            into :new.pk_proj_detail_id, :new.createby_date, :new.createby_user
            from dual;
    elsif updating then
        select sysdate, apex_application.g_user
            into :new.lastmod_date, :new.lastmod_user
            from dual;
    end if;
end;
SHOW ERRORS;
ALTER TABLE PROTRAC_DETAIL ADD (
  CONSTRAINT PROTRAC_DETAIL_PK
PRIMARY KEY
(PK_PROJ_DETAIL_ID)
    USING INDEX
    TABLESPACE DEVPROTRAC_DATA
    PCTFREE    10
    INITRANS   2
    MAXTRANS   255
    STORAGE    (
                INITIAL          64K
                MINEXTENTS       1
                MAXEXTENTS       2147483645
                PCTINCREASE      0
ALTER TABLE PROTRAC_DETAIL ADD (
  CONSTRAINT PROTRAC_DETAIL_NUM
FOREIGN KEY (FK_PROJ_MASTER_ID)
REFERENCES PROTRAC_MASTER (PK_PROJ_MASTER_ID));
ALTER TABLE DEVPROTRAC.RESOURCES ADD (
  FOREIGN KEY (FK_DETAIL_ID)
REFERENCES DEVPROTRAC.PROTRAC_DETAIL (PK_PROJ_DETAIL_ID));
SET DEFINE OFF;
Insert into PROTRAC_DETAIL
   (PK_PROJ_DETAIL_ID, FK_PROJ_MASTER_ID, TRACKIT_NUMBER, DETAIL_DESCRIPTION, DETAIL_STATUS,
    DETAIL_STATUS_COMMENT, DATE_BEGIN, DATE_END, ESTIMATED_DATE, CREATEBY_DATE,
    CREATEBY_USER, LASTMOD_DATE, LASTMOD_USER, TASK_TITLE)
Values
   (34, 24, NULL, 'test', 'Queued',
    NULL, NULL, NULL, NULL, TO_DATE('10/30/2008 13:37:01', 'MM/DD/YYYY HH24:MI:SS'),
    'LREDMOND', TO_DATE('11/03/2008 15:19:35', 'MM/DD/YYYY HH24:MI:SS'), NULL, 'bananana');
Insert into PROTRAC_DETAIL
   (PK_PROJ_DETAIL_ID, FK_PROJ_MASTER_ID, TRACKIT_NUMBER, DETAIL_DESCRIPTION, DETAIL_STATUS,
    DETAIL_STATUS_COMMENT, DATE_BEGIN, DATE_END, ESTIMATED_DATE, CREATEBY_DATE,
    CREATEBY_USER, LASTMOD_DATE, LASTMOD_USER, TASK_TITLE)
Values
   (41, 40, NULL, '2354234', 'Queued',
    NULL, NULL, NULL, NULL, TO_DATE('10/31/2008 00:00:00', 'MM/DD/YYYY HH24:MI:SS'),
    'LREDMOND', TO_DATE('11/03/2008 13:52:02', 'MM/DD/YYYY HH24:MI:SS'), 'LREDMOND', 'I can type on the keyboarddf');
Insert into PROTRAC_DETAIL
   (PK_PROJ_DETAIL_ID, FK_PROJ_MASTER_ID, TRACKIT_NUMBER, DETAIL_DESCRIPTION, DETAIL_STATUS,
    DETAIL_STATUS_COMMENT, DATE_BEGIN, DATE_END, ESTIMATED_DATE, CREATEBY_DATE,
    CREATEBY_USER, LASTMOD_DATE, LASTMOD_USER, TASK_TITLE)
Values
   (49, 32, 78888, 'one day fishsticks will walk on the moon.', 'Queued',
    'waiting for fishsticks.', NULL, NULL, NULL, TO_DATE('11/03/2008 11:28:11', 'MM/DD/YYYY HH24:MI:SS'),
    'LREDMOND', NULL, NULL, 'Fix the keyboard');
Insert into PROTRAC_DETAIL
   (PK_PROJ_DETAIL_ID, FK_PROJ_MASTER_ID, TRACKIT_NUMBER, DETAIL_DESCRIPTION, DETAIL_STATUS,
    DETAIL_STATUS_COMMENT, DATE_BEGIN, DATE_END, ESTIMATED_DATE, CREATEBY_DATE,
    CREATEBY_USER, LASTMOD_DATE, LASTMOD_USER, TASK_TITLE)
Values
   (50, 38, NULL, 'dfdfdfdfdfdfdfdfdf', 'Queued',
    NULL, NULL, NULL, NULL, TO_DATE('11/03/2008 12:03:06', 'MM/DD/YYYY HH24:MI:SS'),
    'LREDMOND', TO_DATE('11/03/2008 15:19:44', 'MM/DD/YYYY HH24:MI:SS'), NULL, 'resreeeeeeeeee');
Insert into PROTRAC_DETAIL
   (PK_PROJ_DETAIL_ID, FK_PROJ_MASTER_ID, TRACKIT_NUMBER, DETAIL_DESCRIPTION, DETAIL_STATUS,
    DETAIL_STATUS_COMMENT, DATE_BEGIN, DATE_END, ESTIMATED_DATE, CREATEBY_DATE,
    CREATEBY_USER, LASTMOD_DATE, LASTMOD_USER, TASK_TITLE)
Values
   (33, 31, NULL, 'Make sure the bananas are fresh', 'Queued',
    NULL, NULL, NULL, NULL, TO_DATE('10/29/2008 00:00:00', 'MM/DD/YYYY HH24:MI:SS'),
    'LREDMOND', TO_DATE('11/03/2008 15:19:52', 'MM/DD/YYYY HH24:MI:SS'), NULL, 'e543563465');
Insert into PROTRAC_DETAIL
   (PK_PROJ_DETAIL_ID, FK_PROJ_MASTER_ID, TRACKIT_NUMBER, DETAIL_DESCRIPTION, DETAIL_STATUS,
    DETAIL_STATUS_COMMENT, DATE_BEGIN, DATE_END, ESTIMATED_DATE, CREATEBY_DATE,
    CREATEBY_USER, LASTMOD_DATE, LASTMOD_USER, TASK_TITLE)
Values
   (48, 37, NULL, 'guitar heros! yay', 'Queued',
    NULL, NULL, NULL, NULL, TO_DATE('11/03/2008 11:26:06', 'MM/DD/YYYY HH24:MI:SS'),
    'LREDMOND', TO_DATE('11/03/2008 15:19:57', 'MM/DD/YYYY HH24:MI:SS'), NULL, '34444444444444543etfg');
COMMIT;This is for the resources table:
ALTER TABLE RESOURCES
DROP PRIMARY KEY CASCADE;
DROP TABLE RESOURCES CASCADE CONSTRAINTS;
CREATE TABLE RESOURCES
  PK_RESOURCES_ID   NUMBER,
  FK_DETAIL_ID      NUMBER,
  EMP_ID            NUMBER,
  RESOURCE_STATUS   VARCHAR2(8 CHAR),
  RESOURCE_COMMENT  VARCHAR2(4000 CHAR),
  CREATEBY_DATE     DATE,
  CREATEBY_USER     VARCHAR2(50 CHAR),
  LASTMOD_DATE      DATE,
  LASTMOD_USER      VARCHAR2(50 CHAR),
  FK_MASTER_ID      NUMBER
TABLESPACE DEVPROTRAC_DATA
PCTUSED    0
PCTFREE    10
INITRANS   1
MAXTRANS   255
STORAGE    (
            INITIAL          64K
            MINEXTENTS       1
            MAXEXTENTS       2147483645
            PCTINCREASE      0
            BUFFER_POOL      DEFAULT
CREATE UNIQUE INDEX RESOURCES_PK ON RESOURCES
(PK_RESOURCES_ID)
TABLESPACE DEVPROTRAC_DATA
PCTFREE    10
INITRANS   2
MAXTRANS   255
STORAGE    (
            INITIAL          64K
            MINEXTENTS       1
            MAXEXTENTS       2147483645
            PCTINCREASE      0
            BUFFER_POOL      DEFAULT
CREATE OR REPLACE TRIGGER BUI_RESOURCES
before insert or update
on RESOURCES
referencing new as New old as Old
for each row
begin
    if inserting then
        select users_seq.nextval, sysdate, apex_application.g_user
            into :new.pk_resources_id, :new.createby_date, :new.createby_user
            from dual;
    elsif updating then
        select sysdate, apex_application.g_user
            into :new.lastmod_date, :new.lastmod_user
            from dual;
    end if;
end;
SHOW ERRORS;
ALTER TABLE RESOURCES ADD (
  CONSTRAINT RESOURCES_PK
PRIMARY KEY
(PK_RESOURCES_ID)
    USING INDEX
    TABLESPACE DEVPROTRAC_DATA
    PCTFREE    10
    INITRANS   2
    MAXTRANS   255
    STORAGE    (
                INITIAL          64K
                MINEXTENTS       1
                MAXEXTENTS       2147483645
                PCTINCREASE      0
ALTER TABLE RESOURCES ADD (
  FOREIGN KEY (FK_DETAIL_ID)
REFERENCES PROTRAC_DETAIL (PK_PROJ_DETAIL_ID),
  FOREIGN KEY (FK_MASTER_ID)
REFERENCES PROTRAC_MASTER (PK_PROJ_MASTER_ID));
SET DEFINE OFF;
Insert into RESOURCES
   (PK_RESOURCES_ID, FK_DETAIL_ID, EMP_ID, RESOURCE_STATUS, RESOURCE_COMMENT,
    CREATEBY_DATE, CREATEBY_USER, LASTMOD_DATE, LASTMOD_USER, FK_MASTER_ID)
Values
   (53, 50, 356654, 'Active', NULL,
    TO_DATE('11/04/2008 09:32:06', 'MM/DD/YYYY HH24:MI:SS'), 'LREDMOND', NULL, NULL, NULL);
Insert into RESOURCES
   (PK_RESOURCES_ID, FK_DETAIL_ID, EMP_ID, RESOURCE_STATUS, RESOURCE_COMMENT,
    CREATEBY_DATE, CREATEBY_USER, LASTMOD_DATE, LASTMOD_USER, FK_MASTER_ID)
Values
   (51, 41, 447250, 'Active', 'No Sure.',
    TO_DATE('11/03/2008 14:23:11', 'MM/DD/YYYY HH24:MI:SS'), NULL, TO_DATE('11/04/2008 09:00:04', 'MM/DD/YYYY HH24:MI:SS'), NULL, 40);
Insert into RESOURCES
   (PK_RESOURCES_ID, FK_DETAIL_ID, EMP_ID, RESOURCE_STATUS, RESOURCE_COMMENT,
    CREATEBY_DATE, CREATEBY_USER, LASTMOD_DATE, LASTMOD_USER, FK_MASTER_ID)
Values
   (54, 50, 323829, 'Active', NULL,
    TO_DATE('11/04/2008 10:26:08', 'MM/DD/YYYY HH24:MI:SS'), 'LREDMOND', NULL, NULL, 38);
Insert into RESOURCES
   (PK_RESOURCES_ID, FK_DETAIL_ID, EMP_ID, RESOURCE_STATUS, RESOURCE_COMMENT,
    CREATEBY_DATE, CREATEBY_USER, LASTMOD_DATE, LASTMOD_USER, FK_MASTER_ID)
Values
   (52, 33, 8915, 'Active', 'get to work',
    TO_DATE('11/03/2008 15:20:18', 'MM/DD/YYYY HH24:MI:SS'), 'LREDMOND', TO_DATE('11/03/2008 15:35:10', 'MM/DD/YYYY HH24:MI:SS'), NULL, NULL);
COMMIT;The results I want is everything above regardless of emp_id assigned (if any). Without the r.emp_id = pps.emple_no join, the query will generate 234234239482304234 results.
Hope this helps.
Edited by: leland on Nov 4, 2008 12:56 PM