Result of conditional function where clause

Similar Questions

• Simple conditional SQL WHERE Clause with two Subselects

  Hi SQL Experts,
  I need some quick help with a query.
  It is a ' select ' for a data source object repository phyiscal table OBI.
  So, I can't put in PL/SQL or in stored procedures. I just need
  have two conditions / selects different according to the user's role (this information comes
  of the session).
  The above does not work:

  -ORA00905. 00000 - 'lack the key word'
  SELECT OFFICENO FROM orgunit
  WHERE
  
  BOX WHEN "SESSION_VARIABLE' LIKE '% globalmanager %' THEN
  ASSIGNEDOFFICES =
  (
  SELECT DISTINCT ASSIGNEDOFFICES
  FROM USERSTABLE INNER JOIN orgunit WE
  OrgUnit. KEY = USERSTABLE. OFFICE
  WHERE USERSTABLE. USERNAME ='VALUEOF (NQ_SESSION. THE USER)"
  )
  ON THE OTHER
  OFFICENO =
  (
  SELECT DISTINCT USERSTABLE OFFICENO
  INNER JOIN orgunit WE
  OrgUnit. KEY = USERSTABLE. OFFICE
  WHERE USERSTABLE. USERNAME ='VALUEOF (NQ_SESSION. THE USER)"
  )
  END;

  Can anyone help?

  Hello

  I can't tell what you want to do by looking at the code that do not do. Maybe:

  SELECT officeno

  For orgunit

  WHERE (session_variable LIKE '% globalmanager %'

  AND IN assignedofficies

  (

  SELECT assignedoffices

  UserTable U1

  JOIN orgunit o1 ON o1.officekey = u1.officekey

  WHERE u1.username = ' VALUEOF (NQ_SESSION. THE USER)"

  )

  )

  OR (NVL (session_variable

  , '?'

  ) NOT LIKE '% globalmanager % '.

  AND IN officeno

  (

  SELECT officeno

  Of u2 usertable

  JOIN orgunit o2 ON o2.officekey = u2.officekey

  WHERE u2.username = ' VALUEOF (NQ_SESSION. THE USER)"

  )

  )

  ;

  There might be a simpler and more efficient way in function your tables and your limit.

  The condition u2.username = ' VALUEOF (NQ_SESSION. The USER) "almost certainly not what you really want.

  .

  Whenever you have any questions, post a small example data (CREATE TABLE and only relevant columns, INSERT statements) for all of the tables involved and also publish outcomes from these data.
  Explain, using specific examples, how you get these results from these data.
  Always say what version of Oracle you are using (for example, 11.2.0.2.0).

  See the FAQ forum: https://forums.oracle.com/message/9362002#9362002

• case of condition in where clause

  Hello
  
  I am a beginner in SQL, but according to my reading of the manual, this syntax should be acceptable. I'm using application express but tested also in Developer SQL and the conclusion that it fails with an error "invalid relational operator", with the line number pointing to the ELSE clause of the condition, but a number of column pointing to white space.
  
  This is a select statement nested, but that shouldn't matter. The fragment in question is:
  
  Select columns
  RES
  where res.villaid =: P605_VILLAID
  and INSTR (: P604_RES_STATES, res.states). = 0
  and (CASE: P604_EXCLUDE_ZERO)
  WHEN 'Y' THEN ' res.rate > 0'
  ELSE ' res.rate > = 0'
  END)
  and res. DEPARTDATE >: P605_STARTDATE
  and res. ARRIVEDATE < =: P605_ENDDATE.
  
  I hope that this puts ok shaped during the validation. The code is looking for bookings within a range of dates (which works very well when the other conditions are discussed), and should only output offset lines (nights) if the user asks for it in the variable of liaison P604_EXCLUDE_ZERO. There are probably other ways to go about this, but I'm too stubborn to renounce it. Well, not yet anyway.
  
  Thanks and greetings
  CS

  select some columns
    from res
   where res.villaid = :p605_villaid
         and instr (:p604_res_states, res.states) != 0
         and sign (res.rate) >= case when :p604_exclude_zero = 'Y' then 1 else 0 end
         and res.departdate > :p605_startdate
         and res.arrivedate <= :p605_enddate
  

• How to check this condition in where clause

  WITH t1 AS
      (SELECT 1 empno, 'Sun' name,100 deptno, 'M' Gender  FROM dual
      UNION ALL
      SELECT 2,'Gun',100 deptno, 'F' FROM dual
      UNION ALL
      SELECT 3, 'Run',50,'M' FROM dual
      UNION ALL
      SELECT 4, 'Nun',75,'F' FROM dual
      UNION ALL
      SELECT 5, 'Tun',25,NULL FROM dual)
      SELECT empno,name,deptno,gender FROM t1;
  
  I want to display those dept. data which is having Genders both 'M' and 'F',

  You can use two ANDed 'exists' conditions...

  ...
  SELECT empno,name,deptno,gender FROM t1 t1o;
  where
  exists (select 'x' from t1 t1i where t1o.deptno = t1i.deptno and t1.gender = 'M')
  and
  exists (select 'x' from t1 t1i where t1o.deptno = t1i.deptno and t1.gender = 'F')
  

• I need account condition in where clause.

  Hi all

  I have a data

  Product ID AMT

  1	100		A
  1	100		B
  1	100		C
  1	100		D
  2	25		A
  2	40		E
  2	55		F
  3	50		B
  3	50		A
  3	50		C
  3	50		G
  4	12		H
  4	13		E
  4	14		A
  4	15		I have

  I need following output

  ID	AMT	Product
  1	100	A
  1	100	B
  1	100	C
  1	100	D
  3	50	B
  3	50	A
  3	50	C
  3	50	G

  I tried after query, but it does not work

  Select

  ID,

  AMT,

  Product

  t

  Product ID, AMT Group,

  having count (distinct ID) = count (distinct AMT)

  It returns all the rows.

  Help, please

  with t as)

  SELECT id,

  AMT,

  product,

  County (separate amt) over (partition by id) cnt

  of sample_data

  )

  SELECT id,

  AMT,

  product

  t

  where cnt = 1

  order by id

  /

  AMT ID P
  ---------- ---------- -
  1 100 A
  1 100 B
  1 100 C
  1 100 D
  3 50
  3 50
  3 50
  3 50

  8 selected lines.

  SQL >

  SY.

• where clause with reg_exp

  Hello
  
  My query is...
  
  The string is "1,2,3"...
  
  output must be '1', ' 2 ', ' 3',
  
  Please help me...!
  
  Concerning
  SA
  
  
  The guru gave the solution...

  select REGEXP_REPLACE('1, 2, 3', '([0-9]+)', '''\1''') from   dual;

  But, I have to use this condition in Where clause on my request. If I put in which the value of the clause does not appear. Any help on that...! Please, I beg you.
  
  Concerning
  SA

  Hello

  Query: SELECT "' | REPLACE ('1,2,3',',' "',"'). "' val FROM DUAL;

  will convert '1,2,3' string '1', ' 2 ', 3'.

  Run the sub queries first and then run a select statement.

  CREATE TABLE sample_table
  (
  col_a VARCHAR2 (3)
  );

  INSERT INTO sample_table
  VALUES ('1');

  INSERT INTO sample_table
  VALUES ('2');

  INSERT INTO sample_table
  VALUES ('3');

  INSERT INTO sample_table
  VALUES ('4');

  INSERT INTO sample_table
  VALUES ('5');

  COMMIT;

  SELECT col_a
  OF sample_table
  WHERE INSTR ((SELECT ''' ||)) REPLACE ('1,2,3',',' "',"'). "' val
  THE DOUBLE).
  col_a
  ) > 0;

  The select statement above will give you the desired result of "sample_table" as below.

  COL_A
  1
  2
  3

  Kind regards
  Big Boss

• Using decode in where clause

  Hello

  I need to use decode condition in where clause in such a way that if the respective column is null then consider the corresponding column

  for example

  Fee_date	Fee_refund_date
  10 OCTOBER 05
  12 NOVEMBER 05
  	11 JANUARY 06
  	16 FEBRUARY 06

  I have a request in place as below where p_fee_flag will be passed as either FEES or set to null, I check another condition as if p_fee_flag is null then fee_date must be set to null when comparing fee_refund_date between TRUNC (BKT. ACT_START_DATE) AND TRUNC (BKT. ACT_END_DATE

  SELECT 1

  BUCKET BKT

  WHERE DECODE (P_FEE_FLAG, 'FEES', TRUNC(FS.) FEE_DATE), TRUNC (FS. FEE_REFUND_DATE))

  BETWEEN TRUNC (BKT. ACT_START_DATE) AND TRUNC (BKT. ACT_END_DATE)

  944524 wrote:

  Hello Alberto,.

  Thank you that's what I ask but is it possible to verify the condition even using decode

  Yes, it is possible, but why?

  Just replace the query in this way:

  select *
    from fee_table f
  where exists(select 1
                  from bucket b
                where decode(:p_fee_flag, 'FEE', f.fee_date, f.fee_refund_date) between b.act_start_date and b.act_end_date)
    and decode(:p_fee_flag, 'FEE', null, f.fee_date) is null;
  

  Kind regards.

  Alberto

• May I ask where clause to satisfy two conditions at the same time (and)

  Hello

  I wrote a few joins and usually in the final stage where condition with certain conditions be satisfied in where clause. In all conditions where I only want one and condition fulfilled only if both are collected.

  If we look at the this funciton is I should meet (get_order_type (ogr.order_number) <>'R')) AND wh1.third_party_warehouse! = 'Y') but I'm not get rid off both that if order_type is 'R' they are removed and if tooling_group is yes then ther are removed the result. I'm trying with both below pointed out together how can check these conditions? I can do in where clause?

  ((sg.tooling_stock_group <> 'Y'))

  and

  (get_order_type (ogr.order_number) <>'R'))

  Of order_goods_received ogr

  LEFT JOIN part_master pm

  On ogr.part_number = pm.part_number

  -stock_groups sg left join

  SG stock_groups left join

  on pm.stock_group = sg.stock_group

  and ((sg.tooling_stock_group! = 'Y'))

  and (get_order_type (ogr.order_number)! = 'R'))

  -Pm.stock_group = sg.stock_group

  LEFT JOIN batch_record_1 br1

  -A FEW MORE CODE HERE-

  WHERE ((ogr.delivery_date > = trunc (date_départ)))

  AND

  ((ogr.delivery_date < = trunc (end_date)))

  AND

  OGR.goods_received_number <>'1' AND

  get_order_type (OGR.order_number) NOT IN ('L') AND

  OGR.returned_to_supplier_indicator not in('S','L') and

  -sg.tooling_stock_group <>'Y '.

  -((sg.tooling_stock_group <> 'Y') and (get_order_type (ogr.order_number) not in ('R')))

  -(get_order_type (OGR.order_number) <>'R' AND sg.tooling_stock_group <>'Y')

  ((sg.tooling_stock_group <> 'Y'))

  and

  (get_order_type (ogr.order_number) <>'R'))

  AND wh1.third_party_warehouse! = « Y »

  UNION

  (

  Thank you.

  Whenever you have a problem with such logic, you should try and draw a logic state diagram:

  In your case, you are looking to two variables, with two possible States (equal to a value or is not it)

  Then, take this sense of the sg.tooling_stock_group T and O as being the get_order_type (ogr.order_number) and create a state diagram logical based on your description of what you want.  We will use a value of "Y" to indicate we want to record and a value of "N" to indicate the folder should not be returned.

  Start with an empty logical diagram...

  T = 'Y' T! = « Y »
  +---------+---------+
  |         |         |
  |         |         |
  |         |         | O = 'R '.
  |         |         |
  |         |         |

  
  +---------+---------+
  |         |         |
  |         |         |
  |         |         | O! = « R »
  |         |         |
  |         |         |
  +---------+---------+

  First of all, you said: "If there is the result returned by the defined user function is"R"and the table that has the tooling_stock_group y then it should avoid this record."

  T = 'Y' T! = « Y »
  +---------+---------+
  |         |         |
  |         |         |
  |    N    |         | O = 'R '.
  |         |         |
  |         |         |
  +---------+---------+
  |         |         |
  |         |         |
  |         |         | O! = « R »
  |         |         |
  |         |         |
  +---------+---------+

  Then you said: "If order_type does not return" R' but the tooling_stock_group is 'Y', then I should not avoid recording ".

  T = 'Y' T! = « Y »
  +---------+---------+
  |         |         |
  |         |         |
  |    N    |         | O = 'R '.
  |         |         |
  |         |         |
  +---------+---------+
  |         |         |
  |         |         |
  |    Y    |         | O! = « R »
  |         |         |
  |         |         |
  +---------+---------+

  Now, you have not given any logic for the rest of the diagram, so I made the assumption that you do not want to avoid these records...

  T = 'Y' T! = « Y »
  +---------+---------+
  |         |         |
  |         |         |
  |    N    |    Y    | O = 'R '.
  |         |         |
  |         |         |
  +---------+---------+
  |         |         |
  |         |         |
  |    Y    |    Y    | O! = « R »
  |         |         |
  |         |         |
  +---------+---------+

  Now there are different ways to determine the location of the clause of this diagram.
  We could say that we want the records for all of the T column! = "Y" or all the records for all of the O line! " = R...

  where (sg.tooling_stock_group! = 'Y' or get_order_type (ogr.order_number)! = 'R')

  We say we want to EXCLUDE (using DO NOT) all records where T = "Y" AND O = "O" "

  If not (sg.tooling_stock_group = 'Y' and (ogr.order_number) get_order_type = 'R')

  Those are the two most logical ways to do.
  (In my previous answer, that we can see in this diagram, there is no need of the "or get_order_type (ogr.order_number).) (= 'R' "part, which is superfluous, but would not break it)

  Now let's look at your logic to see what it looks like to in the diagram...

  where ((sg.tooling_stock_group <> «Y»))
  and (get_order_type (ogr.order_number) <> 'R')
  )

  In a logic diagram that looks to...

  T = 'Y' T! = « Y »
  +---------+---------+
  |         |         |
  |         |         |
  |    N    |    N    | O = 'R '.
  |         |         |
  |         |         |
  +---------+---------+
  |         |         |
  |         |         |
  |    N    |    Y    | O! = « R »
  |         |         |
  |         |         |
  +---------+---------+

  As you can see, your logic was only targeting one of the 4 possible results for select records and excluding 3.

• Difference-conditions (join and a Where Clause)

  Hi people,

  I need to clearly agree on what a difference exactly when we put any condition in INNER JOIN and the WHERE Clause.

  I have tried both way and found the same results. Even in the statistics Plan not much differences.  Any help would be appreciated.

  As:

  1 here, I use filter store in the join condition - Inner

  "SELECT i., Gl * Sc1.Item I.

  Inner Join Sc1.Part P

  On P.Part_Id = I.Part_Id

  Inner Join Sc1.Location Gl

  On Gl.Location_Id = I.Location_Id

  And Gl.Location_Id in (1767, 1747,202,1625)

  Inner Join Sc1.Condition C

  On C.Condtion_Id = Gl.Condition_Id

  Where I.Inactive_Ind = 0

  And I.Condition_Id! = 325

  2. here I use filter store in Where clause-

  SELECT i., Gl * Sc1.Item I

  Inner Join Sc1.Part P

  On P.Part_Id = I.Part_Id

  Inner Join Sc1.Location Gl

  On Gl.Location_Id = I.Location_Id

  Inner Join Sc1.Condition C

  On C.Condtion_Id = Gl.Condition_Id

  Where I.Inactive_Ind = 0

  and I.LOCATION_ID in (1767, 1747,202,1625)

  And I.Condition_Id! = 325

  Thank you

  Mark
  

  
  

  
  

  Hello

  MarkCooper wrote:

  Hi guys,.

  To reply to all - I understand.

  1. its good practice to use conditions / filter (except CLAUSE) in the WHERE Clause rather Inner join? bon ?

  2. now, in my previous example. We could use the location code in where clause as it was in the two tables.

  What is the best practice to use the code to location here ( 1 /2) ?

  1. here I use filter store in the Inner join condition ( guess the location code is not in the article table)).

  "SELECT i., Gl * Sc1.Item I.

  Inner Join Sc1.Part P

  On P.Part_Id = I.Part_Id

  Inner Join Sc1.Location Gl

  On Gl.Location_Id = I.Location_Id

    And Gl.Location_Id in (1767, 1747,202,1625)

  Inner Join Sc1.Condition C

  On C.Condtion_Id = Gl.Condition_Id

  Where I.Inactive_Ind = 0

  And I.Condition_Id! = 325

  2. here I use filter store in Where clause (assume that the location code is not in the article table)-

  SELECT i., Gl * Sc1.Item I

  Inner Join Sc1.Part P

  On P.Part_Id = I.Part_Id

  Inner Join Sc1.Location Gl

  On Gl.Location_Id = I.Location_Id

  Inner Join Sc1.Condition C

  On C.Condtion_Id = Gl.Condition_Id

  Where I.Inactive_Ind = 0

    And Gl.Location_Id in (1767, 1747,202,1625)

  And I.Condition_Id! = 325

  Thank you

  If location_id isn't in the item table, then the join condition

  On Gl.Location_Id = I.Location_Id

  will cause an error.

  Once more, it should not affect results or performance if a condition like

  Gl.Location_Id in (1767, 1747,202,1625)

  is in the clause or the WHERE clause.  No matter if it is be a column called location_id in any other table, or if the same column Gl.Location_Id is used in other conditions.

  As this condition only refers to a table (GI), I recommend you put it in a WHERE clause, just to make the code clearer.

  Yet once, this applies only to the inner joins, not for outer joins and not to CONNECT BY queries.

• Query on calculated field where deletes conditions of the clause

  Hi gurus,
  
  Under a new requirement, we have created a new field calculated in Contact before JC, which removes the condition from which to extract the clause and made full table.
  
  Requirement:
  
  We have a field in the user interface, that has data like "J1234" or "K44335". Customer won't see the first character of the alphabet of these data.
  
  Solution, we have developed:
  
  (1) create a new calculated field 'ABC person UId Calc' as follows.
  
  Name: ABC person UId Calc
  Calculated: true
  Computed value: right ([nobody UId], Len([Person UId]) - 1).
  
  (2) exposed this field in the user interface.
  
  Question:
  
  When the user queries in the applet for this field, the generated SQL code has no condition in a Where Clause to the query on PERSON_UID.
  
  SQL has earlier been something like...
  
  (T25. EMP_FLG = 'N') AND (T25. PERSON_UID LIKE: 3)
  
  But after you make this change, the current SQL is trimmed of the just
  
  (T25. EMP_FLG = 'N')
  
  This means that this isn't question with PERSON_UID, resulting in an impact huge performance.
  
  If someone could suggest on this issue, to the difficulty.
  
  Concerning

  Oh sorry, I guess I missed something.

  I guess the simplest solution is to store the values of redundantly (A, B the value of the value and the value of A + B) and stop using a calculated field.

  You could script something in the PreQuery event, but I think it's an ugly hack.

• Cannot run a «BUSINESS...» WHEN ' with a date in a WHERE CLAUSE condition

  Hello

  I need to check for a condition and date according to the date, he would check a set of host names or the other game... so I thought I could write something like this in the WHERE clause:

  AND HOST_NAME IN

  (

  CASE

  WHEN TO_DATE (: StopDate, 'MON-DD-YYYY') > = TO_DATE ('22 - DEC - 2015 "," DD-MON-YYYY ') THEN

  ('SERVERNAMEA', 'SERVERNAMEB', 'SERVERNAMEC') ON THE OTHER

  ("SERVERNAME1", "NAMESERVER2", "SERVERNAME3")

  END

  )

  I get the following:

  ORA-00907: lack of right parenthesis

  00907 00000 - "lack the right parenthesis.

  But there is no missing parentheses!

  If I take the case... when... end, and run the host_name in ('SERVERNAMEA', 'SERVERNAMEB', 'SERVERNAMEC') (separately, they run fine)...

  I also tried:

  AND

  (

  CASE

  WHEN TO_DATE (: StopDate, 'MON-DD-YYYY') > = TO_DATE ('22 - DEC - 2015 "," DD-MON-YYYY ') THEN

  HOST_NAME IN ('SERVERNAMEA', 'SERVERNAMEB', 'SERVERNAMEC') ELSE

  HOST_NAME IN ('SERVERNAME1","NAMESERVER2","SERVERNAME3")

  END

  )

  the error I get is:

  ORA-00905: lack of keyword

  00905 00000 - 'lack the key word'

  What keyword miss me?

  Post edited by: c75d2e42-06a0-4eb1-a576-5652edcbfbe8

  Hello

  c75d2e42-06a0-4eb1-A576-5652edcbfbe8 wrote:

  It was a typo when transferred to the Oracle forum... the version of Oracle is: PL/SQL version 10.2.0.3.0 (10 G)

  I also used IF the statement and that has not worked (in error "missing parenthesis") which I'm sure is a matter of "syntax"... I did not know that the CASE statement returns the value single only, so it's probably the problem.  Is it possible to re - write this?

  ...

  IF only works in PL/SQL.  It does not in SQL, even if that SQL is embedded in PL/SQL.

  There are many ways to re - write the condition.  And here's one:

  AND ((host_name IN ('SERVERNAMEA', 'SERVERNAMEB', 'SERVERNAMEC')

  AND TO_DATE (: StopDate, "MON-DD-YYYY") > = TO_DATE ('22-DEC-2015', "MON-DD-YYYY")

  )

  OR (host_name IN ('servername1","Nameserver2","SERVERNAME3")

  AND TO_DATE (: StopDate, "MON-DD-YYYY")<  to_date="" ('dec-22-2015', ="">

  )

  )

  If: StopDate can be NULL, it must be a bit more complicated.

  You can also use nested, such as CASE expressions

  AND THE CASE

  WHEN TO_DATE (: StopDate, "MON-DD-YYYY") > = TO_DATE ('22-DEC-2015', "MON-DD-YYYY")

  WHILE CASE

  WHEN host_name IN ('SERVERNAMEA', 'SERVERNAMEB', 'SERVERNAMEC')

  AND THEN 'OK '.

  END

  OTHER CASES

  WHEN host_name IN ('servername1","Nameserver2","SERVERNAME3")

  AND THEN 'OK '.

  END

  END = 'OK '.

  I wonder if this in your application is the best way, however.  If SERVERNAMEA was put into service on December 22, maybe that that fact should be recorded in a table.  If you have a table with 1 row per server, you can consider adding 2 columns DATE to show when the server was first and last used.  Then, rather than use a WHERE clause to test servers appropriate, you could do an inner join.

• Optimize query with function in where clause

  Hello

  I have a query like this:

  SELECT * FROM table_1 t
  WHERE
  (
  -- Clause A (very long clause that filters a lot of rows)
  )
  AND f(t.field) = 'Y' -- This function is heavy but it should filter few rows
  

  This query, it is very slow because I think he's trying to evaluate f() for all rows in table_1.

  Howerver, if I have database query:

  SELECT f(t.field) FROM table_1 t
  WHERE
  (
  -- very long clause that filters a lot of rows
  )
  

  It's very fast.

  How can I reference the query to filter the lines of division A, then by function?

  Thanks in advance!

  If you wrap the function in a select clause then the optimizer can use a scalar subquery caching:

  SELECT * FROM table_1 t 

  WHERE  (  -- Clause A (very long clause that filters a lot of rows)  ) 

  AND (Select f(t.field) From Dual) = 'Y' -- This function is heavy but it should filter few rows

• Outer joins and null in the 'where' clause condition

  Hi people,

  Please help me on this.

  Here's my query.

  with x

  (select 'a' as a dual union all col1)

  Select 'b' as col1 of union double all the

  Select 'c' as double col1

  ),

  y as

  (

  Select 'b' as col2 from dual Union all the

  Select 'c' as col2 from dual Union all the

  Select would be "as col2 from dual Union all the"

  Select 'e' as col2 from dual

  )

  Select * x y right outer join

  on x.col1 = y.col2 and y.col2 is null

  Get all the lines of 'COL1' as null. Why like this?

  Just add the condition to the WHERE clause for example

  WITH x AS
  (SELECT 'a' AS col1 FROM dual UNION ALL
  SELECT 'b' AS col1 FROM dual UNION ALL
  SELECT 'c' AS col1 FROM dual
  ),
  y AS
  (
  SELECT 'b' AS col2 FROM dual UNION ALL
  SELECT 'c' AS col2 FROM dual UNION ALL
  SELECT 'd' AS col2 FROM dual UNION ALL
  SELECT 'e' AS col2 FROM dual
  )
  SELECT * FROM x LEFT OUTER JOIN y
  ON x.col1=y.col2                     ----want to add "and y.col2 is null " condition to get value "a"
  where y.col2 is null
  

• Generating a 'WHERE' clause using a function

  Hi, I have provided,
  
  given the function at the bottom are input parameters.
  
  sk_func (salary, dept_no, Job, hire_date)
  
  whatever input is given these entries should be there in a statement,
  
  For example if I contribute as
  
  Select double sk_func(5000,null,null,null);
  
  I need output where salary = 5000;
  
  If I give as
  
  Select double sk_func(5000,null,'Programmer',null);
  
  I need output to where salary = 5000 and job = 'program';
  
  Hope am clear,
  
  In short that never values are non-null, those all should include in my where clause.
  
  I know how to do it, but in light of the considerations, am finding the best way to do it,
  
  
  Thanks for your answers,

  I could do that

  CREATE OR REPLACE FUNCTION get_where_clause_for_emp_req (
     emp_id IN NUMBER,
     salary IN NUMBER,
     job    IN VARCHAR2,
     dept   IN NUMBER
  )
     RETURN VARCHAR2
  IS
     l_where_clause   VARCHAR2 (2000) := 'WHERE 1=1 ';
  BEGIN
    IF emp_id is not null THEN
      l_where_clause := l_where_clause || 'AND emp_id = ' || emp_id || ' ';
    END IF;
  
    IF salary is not null THEN
      l_where_clause := l_where_clause || 'AND salary = ' || salary || ' ';
    END IF;
  
    IF job is not null THEN
      l_where_clause := l_where_clause || 'AND job = ' || job || ' ';
    END IF;
  
    IF dept is not null THEN
      l_where_clause := l_where_clause || 'AND dept = ' || dept || ' ';
    END IF;
  
    RETURN l_where_clause;
  END;
  

• How to use a function in a Where Clause?

  Hello
  I have a doubt. If MY_FUNCT is a function that returns a Boolean value, can I use in a where clause clause to write a query like this? :
  
  Select...
  table one
  where the...
  *...*
  and MY_FUNC (a.field) = true
  *...*
  *;*
  
  Thank you!
  
  Published by: Mark1970 on 3.27 lug-2-2010

  But is it possible that the function does not return a Boolean value?

  Yes (as sysdate, substr and instr etc.) you can also use your own function in a where clause clause, as long as it does not return a BOOLEAN value.

  I mean how to use a function in a where clause clause?

  Your own pseudocode seems a good example for me.
  So, just give it a try.