EMP table query

Similar Questions

• SELECT on the emp table query

  Hello
  
  
  How to find the display the o/p as a manager name under employees dependent child parent like relation ship on the noraml emp table:
  
  sample o/p:
  
  use of name
  Nativity scene XX
  sales of yy
  YY1 sales
  Manager of the AA
  marketing of RR
  RR1 marketing
  
  
  Thank you

  921306 wrote:

  So I need, like that, child-parent relationship between the Manager under employees...

  Then join the parent with the child entity entity to create the parent-child relationship.

  The two entities are in the same table, it means to join the table to itself. For example

  SQL> select
    2          child.ename                     as CHILD,
    3          child.job                       as CHILD_JOB,
    4          nvl(parent.ename,'')      as PARENT,
    5          parent.job                      as PARENT_JOB
    6  from emp parent,
    7       emp child
    8  where child.mgr = parent.empno (+)
    9  /
  
  CHILD      CHILD_JOB PARENT     PARENT_JO
  ---------- --------- ---------- ---------
  FORD       ANALYST   JONES      MANAGER
  SCOTT      ANALYST   JONES      MANAGER
  JAMES      CLERK     BLAKE      MANAGER
  TURNER     SALESMAN  BLAKE      MANAGER
  MARTIN     SALESMAN  BLAKE      MANAGER
  WARD       SALESMAN  BLAKE      MANAGER
  ALLEN      SALESMAN  BLAKE      MANAGER
  MILLER     CLERK     CLARK      MANAGER
  ADAMS      CLERK     SCOTT      ANALYST
  CLARK      MANAGER   KING       PRESIDENT
  BLAKE      MANAGER   KING       PRESIDENT
  JONES      MANAGER   KING       PRESIDENT
  SMITH      CLERK     FORD       ANALYST
  KING       PRESIDENT 
  
  14 rows selected.
  
  SQL> 
  

  The basic concept is easy - set the parent entity, set the child entity, join the parent to the child.

  If some entities will not have parents (root entities), then an outer join is required of the child entity to the parent entity.

  Everything simply because the two entities are in the same table, does not change the logic or the approach. It's perfectly valid for a join table.

• selecting max 5 salaries in the emp table

  Hi I tried the following query to obtain the emp table max 5 salaries...

  SQL> select sal
    2  from (select sal,empno from emp order by sal desc
    3  where rownum<6;
  
         SAL
  ----------
        5000
        3000
        3000
        2975
        2850

  But here in the output of the duplicate rows are there... I need to remove this and number total should be equal to only 5...
  If I put the distinct clause, then I'll take 4 rows only... but I need the salaries of the top 5...
  
  Thank you

  select *
    from (
  select distinct sal
    from emp
   order by sal desc
   ) where rownum <= 5
  ;
  

• Elapsed time for the materialized view vs Master table query

  Hello all;
  
  Small confusion about time up for the vs Master materialized view table query
  
  

  SQL > select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:30.54
  

  SQL > create materialized view mv1
  2 activate the rewrite of the query as
  3. select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  Materialized view created.
  Elapsed time: 00:00:01.45
  

  SQL > select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:00.01
  
  Please see the three cases "Elapsed Time"...
  
  When comparing other cases.
  1. my query takes long time (30.54), extraction of data from the sale
  2. create a materialized view takes less time (01:45) why?
  
  Source: http://uhesse.com/2009/07/08/brief-introduction-into-materialized-views/

  >
  Small confusion about elapsed time for the materialized view vs Master table query

  SQL > select count (*), sum (quan_sold), sum (amt_sold) from the sale.

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:30.54

  SQL > create materialized view mv1
  2 activate the rewrite of the query as
  3. select count (*), sum (quan_sold), sum (amt_sold) of the sale;
  Materialized view created.
  Elapsed time: 00:00:01.45

  SQL > select count (*), sum (quan_sold), sum (amt_sold) from the sale.

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:00.01

  Please see the three cases "Elapsed Time"...

  When comparing other cases.
  1. my query takes long time (30.54), extraction of data from the sale
  2. create a materialized view takes less time (01:45) why?
  >
  Many queries take less time the second time you run them. After the first performance, there may be many, if not all, lines in the buffer cache. Then the second round will not make any or all e/s physical but will obtain data from the buffer cache.

  Also, you haven't checked that the MV was even used for the second run.

  Drop the MV and make the query several times and means of the time. Then create the MV and do the same thing.

• cloumn on the emp table online

  Hello world
  
  I want to do EMP table in columns by departments
  under the name of employees of each Department
  
  for example,.
  
  10. 20
  CLARK | SMITH
  KING | FORD
  MILLER | ADAMS
  
  Thank you

  You mean like this?

  SQL> select * from emp;
  
       EMPNO ENAME      JOB              MGR HIREDATE                    SAL       COMM     DEPTNO
  ---------- ---------- --------- ---------- -------------------- ---------- ---------- ----------
        7369 SMITH      CLERK           7902 17-DEC-1980 00:00:00        800                    20
        7499 ALLEN      SALESMAN        7698 20-FEB-1981 00:00:00       1600        300         30
        7521 WARD       SALESMAN        7698 22-FEB-1981 00:00:00       1250        500         30
        7566 JONES      MANAGER         7839 02-APR-1981 00:00:00       2975                    20
        7654 MARTIN     SALESMAN        7698 28-SEP-1981 00:00:00       1250       1400         30
        7698 BLAKE      MANAGER         7839 01-MAY-1981 00:00:00       2850                    30
        7782 CLARK      MANAGER         7839 09-JUN-1981 00:00:00       2450                    10
        7788 SCOTT      ANALYST         7566 19-APR-1987 00:00:00       3000                    20
        7839 KING       PRESIDENT            17-NOV-1981 00:00:00       5000                    10
        7844 TURNER     SALESMAN        7698 08-SEP-1981 00:00:00       1500          0         30
        7876 ADAMS      CLERK           7788 23-MAY-1987 00:00:00       1100                    20
        7900 JAMES      CLERK           7698 03-DEC-1981 00:00:00        950                    30
        7902 FORD       ANALYST         7566 03-DEC-1981 00:00:00       3000                    20
        7934 MILLER     CLERK           7782 23-JAN-1982 00:00:00       1300                    10
  
  14 rows selected.
  
  SQL> ed
  Wrote file afiedt.buf
  
    1  with d1 as (select ename, row_number() over (order by empno) as rn from emp where deptno = 10)
    2      ,d2 as (select ename, row_number() over (order by empno) as rn from emp where deptno = 20)
    3      ,d3 as (select ename, row_number() over (order by empno) as rn from emp where deptno = 30)
    4  --
    5  select d1.ename as dept10, d2.ename as dept20, d3.ename as dept30
    6  from   d1 full outer join d2 on (d2.rn = d1.rn)
    7*           full outer join d3 on (d3.rn = nvl(d2.rn,d1.rn))
  SQL> /
  
  DEPT10     DEPT20     DEPT30
  ---------- ---------- ----------
  CLARK      SMITH      ALLEN
  KING       JONES      WARD
  MILLER     SCOTT      MARTIN
             ADAMS      BLAKE
             FORD       TURNER
                        JAMES
  
  6 rows selected.
  

  As already mentioned, in a reporting tool is much better.

• Unique problem with selction on the table (Query Page)

  Unique problem with selction on the table (Query Page)
  
  I have a VO data Bulletin Board, with a transitional attribute for selction unique column.
  My requirement is that I need to identify the line that was selected in the table.
  
  I associated with fireAction singleSelection column, such that whenever the user selects the line
  I'm looking for that VO using some rowIterator.
  But when running the loop of the transient VO that is mapped to the singleSelection variable is the show as "n" / NUll
  for all the lines...
  
  So how do you identify the selected line in singleSelection to a table.
  
  -Sasi

  In the property inspector of the element for which you've put firePartialAction, you can find a property named "parameters". That mention primary key as your setting.

  You can get the arameter using pageContext.getparameter ();

  -Anand

• How to insert 10,000 records test data into the emp table

  Hi I am new to oracle can someone please help me write a program so that I can insert the test data into the emp table

  SELECT       LEVEL empno,
               DBMS_RANDOM.string ('U', 20) emp_name,
               TRUNC (DBMS_RANDOM.VALUE (10000, 100000), 2) sal,
               DBMS_RANDOM.string ('U', 10) job,
               TO_DATE ('1990-01-01', 'yyyy-mm-dd')
               + TRUNC (DBMS_RANDOM.VALUE (1, 6000), 0)
                 hiredate,
               CASE
                 WHEN LEVEL > 10 THEN TRUNC (DBMS_RANDOM.VALUE (1, 11), 0)
                 ELSE NULL
               END
                 mgr,
               TRUNC (DBMS_RANDOM.VALUE (1, 5), 0) deptno
  FROM         DUAL
  CONNECT BY   LEVEL <= 10000
  

• get the cumulative sum of the salaries of the employees of emp table

  Hi gurus,
  
  Can any body tell me how to get the cumulative sum of the salaries of the employees in the emp table using analytical functions.
  
  Thanks in advance...

  Please read the document

  http://download.Oracle.com/docs/CD/B19306_01/server.102/b14200/functions163.htm#sthref2186

  Look for example at the bottom of the document.

• How can I get the second and third highest salary from the emp table

  How can I get the second and third highest salary from the emp table in the ecah Department

  SQL> ed
  Wrote file afiedt.buf
  
    1  select empno, ename, sal, deptno
    2  from (
    3    select empno, ename, sal, deptno, dense_rank() over (partition by deptno order by sal desc) as rn
    4    from emp
    5    )
    6* where rn in (2,3)
  SQL> /
  
       EMPNO ENAME             SAL     DEPTNO
  ---------- ---------- ---------- ----------
        7782 CLARK            2450         10
        7934 MILLER           1300         10
        7566 JONES            2975         20
        7876 ADAMS            1100         20
        7499 ALLEN            1600         30
        7844 TURNER           1500         30
  
  6 rows selected.
  
  SQL>
  

• foreign key ALTER TABLE QUERY PROBLEM

  HAI ALL,
  
  ANY SUGGESTION PLEASE?
  
  UNDER: foreign key ALTER TABLE QUERY PROBLEM
  
  I want TO CREATE AND ALTER TABLE foreign key:
  
  1.TABLE:HAEMATOLOGY1
  COLUMN: HMTLY_PATIENT_NUM
  WITH
  TABLE: PATIENTS_MASTER1
  COLUMN: PATIENT_NUM (THIS IS THE KEY PRIMARY AND UNIQUE)
  
  1.TABLE:HAEMATOLOGY1
  COLUMN: HMTLY_TEST_NAME
  WITH
  TABLE: TESTS_MASTER1
  COLUMN: TEST_NAME ((C'EST LA CLÉ UNIQUE))
  ---------------
  
  
  SQL + QUERY DATA:
  -----------
  ALTER TABLE HAEMATOLOGY1
  Key constraint SYS_C002742_1 foreign (HMTLY_PATIENT_NUM)
  references PATIENTS_MASTER1 (PATIENT_NUM);
  
  ERROR on line 2:
  ORA-01735: invalid option of ALTER TABLE
  
  NOTE: THE NAME OF THE CONSTRAINTS: SYS_C002742_1 TAKEN FROM ORACLE ENTP TABLE DETAILS. MGR.
  ---------
  ALTER TABLE HAEMATOLOGY1
  Key constraint SYS_C002735_1 foreign (HMTLY_TEST_NAME)
  references TESTS_MASTER1 (TEST_NAME);
  
  ERROR on line 2:
  ORA-01735: invalid option of ALTER TABLE
  
  NOTE: THE NAME OF THE CONSTRAINTS: SYS_C002735_1 TAKEN FROM ORACLE ENTP TABLE DETAILS. MGR.
  
  ==============
  
  4 TABLES OF LABORATORY CLINIC FOR DATA ENTRY AND GET REPORT ONLY FOR THE TESTS CARRIED OUT FOR PARTICULAR
  
  PATIENT.
  
  TABLE1:PATIENTS_MASTER1
  COLUMNS: PATIENT_NUM, PATIENT_NAME,
  
  VALUES:
  PATIENT_NUM
  1
  2
  3
  4
  PATIENT_NAME
  BENAMER
  GIROT
  KKKK
  PPPP
  ---------------
  TABLE2:TESTS_MASTER1
  COLUMNS: TEST_NUM, TEST_NAME
  
  VALUES:
  TEST_NUM
  1
  2
  TEST_NAME
  HEMATOLOGY
  DIFFERENTIAL LEUKOCYTE COUNT
  -------------
  
  TABLE3:HAEMATOLOGY1
  COLUMNS:
  HMTLY_NUM, HMTLY_PATIENT_NUM, HMTLY_TEST_NAME, HMTLY_RBC_VALUE, HMTLY_RBC_NORMAL_VALUE
  
  VALUES:
  HMTLY_NUM
  1
  2
  HMTLY_PATIENT_NUM
  1
  3
  MTLY_TEST_NAME
  HEMATOLOGY
  HEMATOLOGY
  HMTLY_RBC_VALUE
  5
  4
  HMTLY_RBC_NORMAL_VALUE
  4.6 - 6.0
  4.6 - 6.0
  ------------
  
  TABLE4:DIFFERENTIAL_LEUCOCYTE_COUNT1
  COLUMNS: DLC_NUM, DLC_PATIENT_NUM, DLC_TEST_NAME, DLC_POLYMORPHS_VALUE, DLC_POLYMORPHS_
  
  NORMAL_VALUE,
  
  VALUES:
  DLC_NUM
  1
  2
  DLC_PATIENT_NUM
  2
  3
  DLC_TEST_NAME
  DIFFERENTIAL LEUKOCYTE COUNT
  DIFFERENTIAL LEUKOCYTE COUNT
  DLC_POLYMORPHS_VALUE
  42
  60
  DLC_POLYMORPHS_NORMAL_VALUE
  40-65
  40-65
  -----------------
  
  
  Thank you
  RCS
  E-mail:[email protected]
  --------

  ALTER TABLE HAEMATOLOGY1
  ADD Key constraint SYS_C002742_1 foreign (HMTLY_PATIENT_NUM)
  references PATIENTS_MASTER1 (PATIENT_NUM);

• How to display data from the emp table?

  Hi everyone, this is my first post in this portal. I want to display the details of the table emp... for this I use this SQL statement.
  
  Select * from emp where mgr = nvl(:mgr,mgr);
  
  When I give the entry as 7698 it shows the matching records... and also when I don't give any input then it shows all the records except the Archbishop with null values.
  
  (1) I want to display all the records when I do not give any input, including null values
  (2) I want to display all the records that a Bishop is null
  
  Is it possible to integrate in order to include all these in a single query.

  Hello

  937440 wrote:
  Hi everyone, this is my first post in this portal.

  Welcome to the forum!
  Don't forget to read the forum FAQ {message identifier: = 9360002}

  I want to display the details of the table emp... for this I use this SQL statement.

  Select * from emp where mgr = nvl(:mgr,mgr);

  When I give the entry as 7698 it shows the matching records... and also when I don't give any input then it shows all the records except the Archbishop with null values.

  (1) I want to display all the records when I do not give any input, including null values
  (2) I want to display all the records that a Bishop is null

  Is it possible to integrate in order to include all these in a single query.

  It's a little unsure what you're asking.
  The following query always includes the lines where mgr is NULL and when the binding variable: mgr is NULL, it displays all the lines:

  SELECT  *
  FROM     emp
  WHERE     LNNVL (mgr != :mgr)
  ;
  

  In other words, when: 7698 = mgr, it displays 6 rows and when: mgr is NULL, it displays 14 rows (assuming you are using the table provided by Oracle scott.emp).

  The following query includes lines where Bishop is ZERO only when the binding variable: mgr is NULL, in which case it shows all lines:

  SELECT     *
  FROM     emp
  WHERE     :mgr     = mgr
  OR       :mgr       IS NULL
  ;
  

  When: mgr = 7698, this will display 5 rows and when: mgr is NULL, it displays 14 rows.

  The following query includes lines where Bishop is ZERO only when the link variab; e: mgr is NULL, in which case it shows only those rows where mgr is NULL. In other words, it treats NULL as a value:

  SELECT     *
  FROM     emp
  WHERE     DECODE ( mgr
              , :mgr, 'OK'
              )     = 'OK'
  ;
  

  When: mgr = 7698, this will display 5 rows and when: mgr is NULL, it displays 1 row.

• minimum hiredate from the emp table

  Hello
  
  There is a table EMP, hiredate column (date). I want to get the record with minimum hiredate and using this query.
  

  SQL> select * from v$version;
  
  BANNER
  ----------------------------------------------------------------
  Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
  PL/SQL Release 10.2.0.4.0 - Production
  CORE    10.2.0.4.0      Production
  TNS for Solaris: Version 10.2.0.4.0 - Production
  NLSRTL Version 10.2.0.4.0 - Production
  
  SQL> with t as
    2  (select 'A' ename, 1 enum, '1-Oct-2008' hiredate from dual union all
    3  select 'B', 2, '1-Jan-2002' from dual union all
    4  select 'C', 3, '1-Mar-2008' from dual)
    5  select * from t
    6  where hiredate = (select min(hiredate) from t);
  
  E       ENUM HIREDATE
  - ---------- ----------
  B          2 1-Jan-2002
  
  SQL> 

  Is there another way to do it, without using subquery?
  
  Kind regards
  Ritesh

  Another option:

  SELECT  MIN(ENUM)       KEEP (DENSE_RANK FIRST ORDER BY HIREDATE)       AS ENUM
  ,       MIN(HIREDATE)   KEEP (DENSE_RANK FIRST ORDER BY HIREDATE)       AS HIREDATE
  FROM    t
  

  EDIT: See the post of John Spencer as it has a more in-depth explanation. This will only return the FIRST record oracle meets with minimal hiredate. It will not return more records if more than one employee has the same minimum hiredate.

  Published by: Centinul on October 23, 2009 09:38

• Master & detail table query

  My table structure

  create table company(
  co_id number(9) primary key,
  coname varchar2(32));
  
  create table co_location(
  co_id number(9) constraint location_fk references company(co_id),
  country varchar2(25));
  
  create table prod(
  co_id number(9) constraint prod_fk references company(co_id),
  prod_id number(14) primary key,
  prod varchar2(32));
  
  insert into company(co_id,coname) values(1,'ABC and Co');
  insert into co_location(co_id,country) values(1,'France');
  insert into prod(co_id,prod_id,prod) values(1,1,'aa');
  insert into prod(co_id,prod_id,prod) values(1,2,'bb');
  insert into prod(co_id,prod_id,prod) values(1,3,'cc');
  insert into prod(co_id,prod_id,prod) values(1,4,'aa');
  insert into prod(co_id,prod_id,prod) values(1,5,'ee');

  for example
  Company.Coname = "ABC and Co";
  co_location. Country = "France";
  Prod.Prod = "AA";
  
  I want to search 3 specific columns in the path:

   select a.co_id,coname,country,prod
   from
    company a, co_location b, prod c
   where
    a.co_id=b.co_id
   and
    a.co_id=c.co_id
   and
    coname='ABC and Co'
   and
    country='France'
   and
    prod='aa'
   /
  
  
       CO_ID CONAME                           COUNTRY                   PROD
  ---------- -------------------------------- ------------------------- ------------------------------
           1 ABC and Co                       France                    aa

  In this query, the problem is that company.coname and co_location.country is OK but prod creating problems as a co_id has much prod_id
  
  Thank you and best regards

  example with more than 1 column:

  SQL> ed
  Wrote file afiedt.buf
  
    1  select d.deptno, d.dname, e.empno, e.ename
    2  from emp e join dept d on (e.deptno = d.deptno)
    3* order by d.deptno, e.empno
  SQL> /
  
      DEPTNO DNAME               EMPNO ENAME
  ---------- -------------- ---------- ----------
          10 ACCOUNTING           7782 CLARK
             ACCOUNTING           7839 KING
             ACCOUNTING           7934 MILLER
          20 RESEARCH             7369 SMITH
             RESEARCH             7566 JONES
             RESEARCH             7788 SCOTT
             RESEARCH             7876 ADAMS
             RESEARCH             7902 FORD
          30 SALES                7499 ALLEN
             SALES                7521 WARD
             SALES                7654 MARTIN
             SALES                7698 BLAKE
             SALES                7844 TURNER
             SALES                7900 JAMES
  
  14 rows selected.
  
  SQL> break on deptno on dname
  SQL> select d.deptno, d.dname, e.empno, e.ename
    2  from emp e join dept d on (e.deptno = d.deptno)
    3  order by d.deptno, e.empno
    4  /
  
      DEPTNO DNAME               EMPNO ENAME
  ---------- -------------- ---------- ----------
          10 ACCOUNTING           7782 CLARK
                                  7839 KING
                                  7934 MILLER
          20 RESEARCH             7369 SMITH
                                  7566 JONES
                                  7788 SCOTT
                                  7876 ADAMS
                                  7902 FORD
          30 SALES                7499 ALLEN
                                  7521 WARD
                                  7654 MARTIN
                                  7698 BLAKE
                                  7844 TURNER
                                  7900 JAMES
  
  14 rows selected.
  
  SQL>
  

• run wth params does not when used with table query Panel

  Hi Experts ADF,

  JDev 12 c

  I have a VO query that binds variables in which its clause. It also has a ViewCriteria who is dragged as a query with table Panel.

  When the loading of the page table does not display data.

  Click on the query search button, it works.

  Please let me know your opinion on this.

  Thank you

  Roy

  This is normal.

  You can replace it by initialQueryOverriden = true binary: display executed before the result of the query in a search engine

  Dario

• Multi table query with key foreign null.

  Consider the following tables

  create table student (
   id number not null,
   name varchar2(80),
  primary key(id)
  );
  
  create table course(
    id number not null,
    subject varchar2(120),
    primary key(id)
  );
  
  create table class(
   id number not null,
   name varchar2(80),
   day number,
   course_id number not null,
   primary key(id),
   foreign key(course_id) references course(id)
  );
  
  create table student_course(
    id number not null,
    student_id number not null,
    course_id number not null,
    class_id number,
    primary key(id),
    foreign key(student_id) references student(id),
    foreign key(course_id) references course(id),
    foreign key(class_id) references class(id)
  );
  

  The student may enroll in a course and then a Professor assign to a class, that's why foreign class_id key isn't a constraint not null.

  What I want is to write a query so that the student can see all courses, it is registered for the class, that he has been assigned and the day of the class, but the report should include courses where the student is not assigned to a class again.

  I wrote the following query.

  select
   course.subject,
   class.name,
   class.day
  from
    course,
    class,
    student_course,
    student
  where course.id = student.course_id
  and class.id = student_course.class_id
  and student_course.foititis_id = get_foititis_id
  

  However, I only get the lines where the student_course.class_id is not null.

  I tried various combinations of coalesce, nvl, decode in both the select statement and where statement, but the results where garbage.

  No idea if such a request is possible?

  Thanks in advance for any help.

  Hello

  Thanks for posting the instructions CREATE TABLE.  Don't forget to display instructions INSERT for a litle sample data and the results desired from these sample data.

  odysam wrote:

  ... I wrote the following query.

  1. Select
  2. race. Subject,
  3. Class.Name,
  4. Class.Day
  5. Of
  6. Of course
  7. class,
  8. student_course,
  9. Student
  10. where course.id = student.course_id
  11. and class.id = student_course.class_id
  12. and student_course.foititis_id = get_foititis_id

  However, I only get the lines where the student_course.class_id is not null.

  I tried various combinations of coalesce, nvl, decode in both the select statement and where statement, but the results where garbage.

  No idea if such a request is possible? ...

  It's logical.  The condition on line 11

  Class.ID = student_course.class_id

  will not be TRUE is student.course.class_id is null.

  As Someoneelse said, looks like you need an Outer Join.

  Inner joins, as you use above, produce results only when a row in a table has one matching row in another table.

  In this case (as far as I can tell without data sample or results), you want to display the rows in a table with their matching rows When THERE is a MATCHING ROWS, but you want to show each row of the first table in any case, if corresponding lines.  This is an outer join.