Need comment on WHERE clause

i want to know in what order conditions in where clause evaluates.
select * from table
where emp_id
and tran_year
and tran_mon
select * from table
where tran_mon
and tran_year
and emp_id
consider tran_year, tran_mon , emp_id are primary key and table having record month wise , and consider employees are 50,000, so for one month 50000 record will be there .
so i believe 2nd query will faster than 1st one , becse oracle read from bottom so it will first filter acording emp_id .Please tell me if i m wrong

user12108669 wrote:
thanx for reply
but in very simple case like this one , in which we have only primary key ,, and only one table ,, in that case also order will be ignored .?Yes especially for the simple cases the order is of no relevance.
If you join more then 10 tables the number of permutations for those tables (all combinations) will be quite big. There is a (undocumented) parameter that influences the CBO on how many tables/permutations it will try. This influences the parsing time of the query. But for simple queries such a thing has absolutly no consequence.
Sorry I was talking about having multiple tables in the FROM clause. Not about multiple condition in the where clause. The main thing still is identical. The order has no real relevance. CBO will choose an order mostly depending on index usage. There could be more complexe example where the order might get some importance again, but those are extremly special cases (I think jonathan lewis once showed such an example) Difficult to dig it up now.
Edited by: Sven W. on Dec 2, 2010 3:19 PM
Edited by: Sven W. on Dec 2, 2010 3:20 PM

Similar Messages

Need Help on where clause condition

Hello All,
Thanks in advance::
I have below SQL query which is returning 1500 records when i dont use any condition in where clause(Please see the query below);
SELECT POS_TYPE,
POS_ID,
SUB_ACNT_ID,
CHRG,
DOC,
NULL,
ACNT_RLN,
ACCOUNT_FLODERS_VER,
DM_LSTUPDDT,
DM_BTNUMBER,
DM_USERID,
DM_WSID,
STAT_FLG,
SERVICES_FLG,
SERVICES,
INTRST_COND,
PST_INSTRN
FROM &&SRC.ACCOUNT_FOLDERS,
&&SRC.DB;
Output: 15 rows retured
And when i validate the data by putting some conditions in where clause , it is giving 1499 records ( Please see the query below with condition )
SELECT POS_TYPE,
POS_ID,
SUB_ACNT_ID,
CHRG,
DOC,
NULL,
ACNT_RLN,
ACCOUNT_FLODERS_VER,
DM_LSTUPDDT,
DM_BTNUMBER,
DM_USERID,
DM_WSID,
STAT_FLG,
SERVICES_FLG,
SERVICES,
INTRST_COND,
PST_INSTRN
FROM &&SRC.ACCOUNT_FOLDERS,
&&SRC.DB
WHERE (POS_TYPE,
POS_ID,
SUB_ACNT_ID) IN (SELECT POS_TYPE,
POS_ID,
SUB_ACNT_ID FROM ACCOUNT
WHERE DM_LSTUPDDT > 1_LAST_RUN_DATE OR 1_FIRST_RUN_FLAG=1);
Now, I wanted to know that missing record(1st SQL is giving 1500 rows without any condition & 1nd SQL is giving 1499 rows with condition in where clause)
I am worried and confused to find out the missing record. Tried with different conditions like Not In... nothing worked perfectly.
Could some one please have a look and provide me the correct SQL , Performance wise also it should be good, SQL should not cause any performance issues.
Please help me on it..
Thanks,
MKR

Do a minus
SELECT POS_TYPE,
       POS_ID,
       SUB_ACNT_ID,
       CHRG,
       DOC,
       NULL,
       ACNT_RLN,
       ACCOUNT_FLODERS_VER,
       DM_LSTUPDDT,
       DM_BTNUMBER,
       DM_USERID,
       DM_WSID,
       STAT_FLG,
       SERVICES_FLG,
       SERVICES,
       INTRST_COND,
       PST_INSTRN
FROM &&SRC.ACCOUNT_FOLDERS, &&SRC.DB;
MINUS
SELECT POS_TYPE,
       POS_ID,
       SUB_ACNT_ID,
       CHRG,
       DOC,
       NULL,
       ACNT_RLN,
       ACCOUNT_FLODERS_VER,
       DM_LSTUPDDT,
       DM_BTNUMBER,
       DM_USERID,
       DM_WSID,
       STAT_FLG,
       SERVICES_FLG,
       SERVICES,
       INTRST_COND,
       PST_INSTRN
FROM &&SRC.ACCOUNT_FOLDERS, &&SRC.DB
WHERE (POS_TYPE, POS_ID, SUB_ACNT_ID) IN (SELECT POS_TYPE, POS_ID, SUB_ACNT_ID
                                             FROM ACCOUNT
                                            WHERE DM_LSTUPDDT > 1_LAST_RUN_DATE
                                               OR 1_FIRST_RUN_FLAG = 1); G.

Need help decifering where clause

What do these excerpts from where statements do?
1) and a_id = b_id + 0
also
2) and a_position = b.position || ''
More importantly where does this kind of stuff show up in the Oracle documentation (joins?)
Thanks
Holly

Functionally, those clauses are identical to
and a_id = b_idand
and a_position = b.positionThe difference is that adding 0 or concatenating a NULL prevents Oracle from using an index on b_id of b.position. That may have been intentional on the part of a previous developer, particularly if the application was originally written using the rule-based optimizer.
Justin
Frank beat me to it.
Message was edited by:
Justin Cave

Need logic for WHERE-clause

Hi,
I have a selet statement where i need to write below logic .
SELECT bldat xblnr kunnr rstgr xref1 xref2
           bukrs belnr blart wrbtr waers shkzg
           buzei zfbdt dmbe2 sgtxt augbl augdt
           zbd1t zbd2t
      FROM bsid
      INTO CORRESPONDING FIELDS OF TABLE int_output
      WHERE bldat IN so_bldat AND
               shkzg IN so_shkzg AND
                wrbtr IN so_wrbtr.
Range needs to be entered where from value (for wrbtr field) is -ve negative and to value is +ve positive e.g., -1000 to +200 -:in this case go to BSID with value from 0 to 1000 with debit/credit indicator H and again 0 to 200 with debit/credit indicator S..
can somebody tell me how to set range for the above requirement.
Really need help.
Edited by: Thomas Zloch on May 25, 2011 3:27 PM

change:
AND
shkzg IN so_shkzg AND
wrbtr IN so_wrbtr.
to
and ( (SHKZG eq 'H' and wrbtr le 1000 ) or
          (SHKZG eq 'S' and wrbtr le 200 ) ). ??

Dynamic Where Clause in a Loop ??

I need a dynamich where-clause in a Loop-Statement, like this:
LOOP AT gt_outtab INTO gs_outtab
WHERE ( delta IS INITIAL AND <f_per> IS INITIAL ).
    gs_outtab-delta = gs_outtab-per01.
    MODIFY gt_outtab FROM gs_outtab.
ENDLOOP.
First I tried this:
LOOP AT gt_outtab INTO gs_outtab
WHERE ( delta IS INITIAL AND (ls_per) IS INITIAL ).
    gs_outtab-delta = gs_outtab-per01.
    MODIFY gt_outtab FROM gs_outtab.
ENDLOOP.
but with both I get a syntax error.
Do you have an idea, how can I use the component I need dynamically?
thanks.
Samir

HI
GOOD
Dynamic Conditions
To specify a condition dynamically, use:
SELECT ... WHERE (<itab>) ...
where <itab> is an internal table with line type C and maximum length 72 characters. All of the conditions listed above except for selection tables, can be written into the lines of <itab>. However, you may only use literals, and not the names of data objects. The internal table can also be left empty.
If you only want to specify a part of the condition dynamically, use:
SELECT ... WHERE <cond> AND (<itab>) ...
You cannot link a static and a dynamic condition using OR.
You may only use dynamic conditions in the WHERE clause of the SELECT statement.
===============================
DATA: TAB_SPFLI   TYPE TABLE OF SPFLI,
      TAB_SFLIGHT TYPE SORTED TABLE OF SFLIGHT
                       WITH UNIQUE KEY TABLE LINE,
      WA LIKE LINE OF TAB_SFLIGHT.
SELECT CARRID CONNID
INTO   CORRESPONDING FIELDS OF TABLE TAB_SPFLI
FROM   SPFLI
WHERE CITYFROM = 'NEW YORK'.
SELECT CARRID CONNID FLDATE
INTO   CORRESPONDING FIELDS OF TABLE TAB_SFLIGHT
FROM   SFLIGHT
FOR ALL ENTRIES IN TAB_SPFLI
WHERE CARRID = TAB_SPFLI-CARRID AND
       CONNID = TAB_SPFLI-CONNID.
LOOP AT TAB_SFLIGHT INTO WA.
AT NEW CONNID.
    WRITE: / WA-CARRID, WA-CONNID.
ENDAT.
WRITE: / WA-FLDATE.
ENDLOOP.
THANKS
MRUTYUN

Using Filter and where clause in GoldenGate

Hi,
I need to use where clause in extract process.
The condition i need to use is :- where (CODE LIKE '10%' OR CODE LIKE '0%')
how to use LIKE operation along with OR in extract.
I have multiple where conditions these are straight i.e = and <> which are working fine. But LIKE is not working.
Please do assist for the same.
Thanks.

GoldenGate uses FILTER and SQLPREDICATE (and COMPUTE is a variation that can work, depending on how you are trying to manipulate the data).
To filter data, you can use:
● A FILTER or WHERE clause in a TABLE statement (Extract) or in a MAP statement (Replicat).
● A SQL query or procedure
● User exits
FILTER comparison operators include:
Comparison operators:
> (greater than)
>= (greater than or equal)
< (less than)
<= (less than or equal)
= (equal)
<> (not equal)
WHERE clause permissible operators:
Column names PRODUCT_AMT
Numeric values -123, 5500.123
Literal strings "AUTO", "Ca"
Built-in column tests @NULL, @PRESENT, @ABSENT (column is null, present or absent in the row). These tests are built into Oracle GoldenGate. See “Considerations for selecting rows with FILTER and WHERE” on page 155.
Comparison operators =, <>, >, <, >=, <=
Conjunctive operators AND, OR
Grouping parentheses Use open and close parentheses ( ) for logical grouping of multiple elements.
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Where clause in Detail VO - Jdev 10.1.3.2

Hi..
I have two VO and one VL join them.
I need to set where clause in Detail view but when I load the page no one record from detail vo shows up.
Master VO - companyView
companyId,
companyName
Detail VO - EmployeeView
EmpId
EmpName
CompanyId,
DeptId...
What I need is to set a clause like this
Select EmpId, EmpName,CompanyId,DeptId from Employee where DeptId = 3
if I set the value 3 in my detail VO is ok.
but if I chage for a Bind Variable and define the variable using setNamedWhereClauseParam("myVariabel",3); in Prepare session it doesn´t work
Someone knows How can I fix this problem?
Thanks
Willian

Hello Maxi
ViewCreteria really works fine.
However, it only works only if I run the view object detail itself.
If I run a Linked Master/Detail Queries
it ignores my criteria.
Would you know how could I set a criteria the works in a linked master/detail query?
Thanks
Willian

Dynamic itab with Dynamic Where clause

Hi, Dear All,
Can someone provide a code extract for Dynamic where clause, i had already done with dynamic itab for a given set of fields, and i need to add where clause dynamically for a given field for a given range of values.
select (i_fields) into table <dyn_table>
                  from (p_table)
                 where (v_where).
In the above except the where clause, everything is done. Please help me.
with best regards
Mahesh

Hi,
here is the code extract for your reference.Pl. correct me.
with regards
REPORT Z_DYN_ITAB                              .
TYPE-POOLS: SLIS.
DATA:NAME(100) TYPE C.
TYPES: BEGIN OF ITAB_TYPE,
        WORD(20),
      END   OF ITAB_TYPE.
DATA: ITAB TYPE STANDARD TABLE OF ITAB_TYPE WITH HEADER LINE.
DATA: vg_fields(255) TYPE c,
      i_fields LIKE TABLE OF vg_fields.
DATA: it_fcat TYPE slis_t_fieldcat_alv,
      is_fcat LIKE LINE OF it_fcat,
      ls_layout TYPE slis_layout_alv.
DATA: it_fieldcat TYPE lvc_t_fcat,
      is_fieldcat LIKE LINE OF it_fieldcat.
field-symbols: <dyn_table> type standard table,
               <dyn_wa>,
               <dyn_field>.
data: dy_table type ref to data.
data: dy_line type ref to data,
      xfc type lvc_s_fcat.
DATA: v_where TYPE string, " Variable for storing where clause.
      v_dynamic(18) TYPE c, "variable to store select option datatype
      o_field TYPE REF TO cx_root," object to catch exception
      text TYPE string. "string variable to store exception text.
CONSTANTS: c_var(15) TYPE c VALUE ' IN S_RANGE'.
selection-screen begin of block b1 with frame.
parameters: p_table(30) type c default 'T001',
            p_name(100) type c,
            p_field(10) TYPE c. " Parameter to capture field name.
SELECT-OPTIONS: s_range FOR v_dynamic. " Select-option for range.
selection-screen end of block b1.
start-of-selection.
NAME = p_name.
SPLIT NAME AT ',' INTO TABLE ITAB.
LOOP AT ITAB.
is_fcat-fieldname = itab-word.
is_fcat-tabname = p_table.
APPEND is_fcat to it_fcat.
ENDLOOP.
LOOP AT it_fcat INTO is_fcat.
is_fieldcat-fieldname = is_fcat-fieldname.
is_fieldcat-tabname = is_fcat-tabname.
APPEND is_fieldcat TO it_fieldcat.
CONCATENATE is_fieldcat-tabname is_fieldcat-fieldname INTO
        vg_fields SEPARATED BY '~'.
APPEND vg_fields TO i_fields.
ENDLOOP.
perform create_dynamic_itab.
perform get_data.
Create dynamic internal table and assign to FS
form create_dynamic_itab.
call method cl_alv_table_create=>create_dynamic_table
exporting
it_fieldcatalog = it_fieldcat
importing
ep_table = dy_table.
assign dy_table->* to <dyn_table>.
Create dynamic work area and assign to FS
create data dy_line like line of <dyn_table>.
assign dy_line->* to <dyn_wa>.
endform.
form get_data.
Select Data from table.
CONCATENATE p_field c_var INTO v_where.
TRY.
select (i_fields) into table <dyn_table>
                  from (p_table)
                 where (v_where).
if sy-dbcnt = 0.
write : text-t02.
endif.
*Write out data from table.
Loop at <dyn_table> into <dyn_wa>.
do.
assign component sy-index of structure <dyn_wa> to <dyn_field>.
if sy-subrc <> 0.
exit.
endif.
if sy-index = 1.
write:/ <dyn_field>.
else.
write: <dyn_field>.
endif.
enddo.
endloop.
Exception Catching.
CATCH cx_root INTO o_field.
text = o_field->get_text( ).
Calling Function to give information message regarding Exception
CALL FUNCTION 'POPUP_TO_INFORM'
EXPORTING
titel = text-t03
txt1 = text
txt2 = text-t04.
TXT3 = ' '
TXT4 = ' '
LEAVE TO LIST-PROCESSING.
ENDTRY.
endform.

Bc4j: set where clause at runtime for view objcet ?

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select a.para_id, b.para_para_id
from table1 a, table2 b
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select * from (
select a.para_id, b.para_para_id
from table1 a, table2 b
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REP 300 error when using dynamic where clause

Hi,
I am developing a report and I need a dynamic where clause.The code I have written in the where clause is as below
function where_clauseFormula return VARCHAR2 is
begin
if :P_PO_REQD = 'No' then
return ('and pha.segment1 is null');
elsif :P_PO_REQD = 'Yes' then
return('and pha.segment1 between NVL(:p_po_num_from,1) and NVL(:p_po_num_to,99999999999999999)');
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end if;
end;
Now if i directly use either of the conditions in my report query it works fine.But if the parameter is No then the where clause does not work.I have also tried different statements in the if clause of the 'No' part and they work.For example the following code works when :P_PO_REQD is 'No' :
function where_clauseFormula return VARCHAR2 is
begin
if :P_PO_REQD = 'No' then
return ('and pha.segment1 between NVL(:p_po_num_from,1) and NVL(:p_po_num_to,99999999999999999)');
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Thanks
Mukund

You may use Lexical Reference for the dynamic where. In After Parameter Form Trigger, code....
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:P_where := :P_where || 'and pha.segment1 is null';
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Because of this problem 95% of our Forms can not be generated anymore.
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I mean:
select * from T-A, T-B
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or
select * from T-A, T-B
where T-A.id = T-B.id (+)
and (T-B.number (+) <> 570
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null

Need a FM to convert into dynamic where clause

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year date + 6(4).
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SELECT NON EMPTY {[Measures].[meas_sg]} ON COLUMNS,
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Or to go off of Sean's suggestion, programmatically change the value of the substitution variable, and leave the code alone.
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Cameron Lackpour

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Thnaks

Hi,
Could you please share the code segment for reference. Then we can tell the solution.
Regards,
Tarun

Need comment on WHERE clause

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