explain the flow what exactly is the below function do in detail.
FUNCTION Get_RmtUsr_rec_FUNC (p_MsgType IN VARCHAR2)
RETURN RemoteUser_Rec_Type;FUNCTION Get_RmtUsr_rec_FUNC ( p_MsgType IN VARCHAR2)
RETURN RemoteUser_Rec_Type
IS
[Code]....
SQL Statement Processing Steps:
1. Create a cursor.
2. Parse the statement.
parsing (syntax check, semantic check, privilege check, allocate private sql area, shared pool check (library cache check shared sql area. Here is hard or soft parse)SQL queries submitted to the system first run through the parser, which checks syntax and analyzes semantics. The result of this phase is called a parsed representation of the statement.
This parsed representation is then sent to the optimizer, which handles three main functionality:Transformation, estimation, and execution plan generation.
3. Describe query results.
4. Define query output.
5. Bind variables.
6. Parallelize the statement.
7. Execute the statement.
8. Fetch rows of a query.
9. Close the cursor.
- What stages from the above are included in the 'Query Optimizer Stage'
- Is the parse tree created after doing both syntax check and systematic check as I found notes where they mention it was done before symantic check
- What stages are skipped when doing soft parse vs hard parse
-when mentioned parsed representation, is that the same as parse tree.
I am just trying to understand more the flow of the query processing.
Is anyway to create function based index for group function columns.
For example
select max(timestamp),min(age),averge(sal).... ... .. from tab;
I have the following C code:
class Factorial {
public:
int getVal (int a);
};
[code]....
/When I am trying to execute this function always get the ORA-06521. I changed the data types - but nothing changed.
Just in case, listener.ora
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = db)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
[code]....
What is the Difference between a Stand Alone Function/Procedure & a Function/Procedure declared in a Package.
View 2 Replies View RelatedWhat is advantage of Deterministic function over normal function?
What is the diff B/W Deterministic function and normal function and also give me a example in which scenario we use Deterministic function?
i have a query where i am using the max function to find the most recent record. What i want to do is use that query as part of an insert statement into a different table, however, i don't want to insert the column that i used the max function on. Is there anyway to use the max function without having the column it is being used on showing in the results?
View 1 Replies View RelatedI have the following query.
sql
Original
- sql Code
SELECT class, COUNT (class)
FROM nv_table
WHERE l_id IN (
SELECT l_id
FROM n_table
WHERE id IN (1234)
GROUP BY class
ORDER BY class
SELECT class, COUNT (class)
FROM nv_table
WHERE l_id IN ( SELECT l_id FROM n_table WHERE id IN (1234)
GROUP BY class
ORDER BY class
It returns two columns: class and the total number of values in that class.
In some cases, there might not be any values under a certain class, so the query won't return anything.
In such a case I want the query to return 0. So what I want to see is:
class:A, COUNT(class):0
I'm trying to use the NVL function here, but either it doesn't work in this context, or it's not the correct syntax the way I'm writing it.
sql
Original
- sql Code
SELECT class, NVL(COUNT (class), 0)
FROM nv_table
WHERE l_id IN (
SELECT l_id
FROM n_table
WHERE id IN (1234)
[Code]....
I am creating an stored function which has to do some inserts in the meanwhile, and return after all the work has done, an UDT (2 or 3 columns of NUMBER datatype).
With this scenario I have an problem. The DML operations are not supported by and "SELECT * FROM Table(MyProc(args))". I have to use this "SELECT * FROM Table(MyProc(args))" because I need to pass the stored function results directly to an dataset.
Using a Stored Procedure it gives no errors, but the arguments must be passed like OUT params, and it is not what I want.
My question is:
Is there any other way to get a result (UDT) of an Stored Function (that makes Inserts) into a DataSet?
I've been tasked to parse tags from a string that look like the following:
{Date + XXX}
where XXX represents a numeric value. I have to replace this, including the brace characters with
SYSDATE + XXX
which will ultimately calculate SYSDATE plus the number of days suggested by XXX. The problem is that I am trying to use regexp_replace to achieve this goal but since XXX is completely arbitrary, I cannot search for it as a fixed value. So, ultimately, I would like to use a regular expression that ignores the numeric part of my search and only replaces the starting brace, the "Date + " part and the ending brace, leaving the numeric portion intact. I was trying to do something like the following
myString := regexp_replace(myString, '{(Date + [^[::digit:]]{1,})}', to_char(SYSDATE, 'FMMONTH DD, YYYY'));
in hopes of making it ignore the numeric part but it, instead, treats occurrences as a non match. Alternatively, the call below
myString := regexp_replace(myString, '{(Date + [[:digit:]{1,})}', to_char(SYSDATE, 'FMMONTH DD, YYYY'));
matches correctly but replaces the numeric portion as well, so I'm left with just today's date instead of the calculated future date...
I'm posting below test case in which I'm not able to understand output for LAST_VALUE function. I'm expecting maximum value for the salary in a department. Because I'm partitioning by department and ordering a partition as assending so being last value it should give me maximum value within a partition i.e. department in this case.
CREATE TABLE EMP_MST
(
EMP_ID NUMBER(5),
EMP_NAME VARCHAR2(30),
CONSTRAINT PK_EMP_MST PRIMARY KEY(EMP_ID)
[code]...
can i have more than one pl sql blocks in a function and can i use the variable of one cursor into another cursor of the same function?
View 2 Replies View RelatedThere is an 'emp' table with a column name as 'mgr' with datatype 'number'. following is the detailed description of the table:
SQL> desc emp;
Name Null? Type
----------------------------------------- -------- ---------------------------
EMPNO NOT NULL NUMBER(4)
ENAME VARCHAR2(10)
JOB VARCHAR2(9)
MGR NUMBER(4)
HIREDATE DATE
SAL NUMBER(7,2)
COMM NUMBER(7,2)
DEPTNO NUMBER(2)
Now when I run the 'select mgr from emp e;' query the output which I get is:
7902
7698
7698
7839
7698
7839
7839
7566
7698
7788
7698
7566
7782
Note: One value in between here is null, the required to me is that I want to print a character value 'President' in place of null .
I have two tables where I have to find the record for Max value of the column sap_pkid for every sap_id as in given table create script. This script is giving correct value but looking for a better way so that when data increses it doesn't hit the performance.
way where max can be avoided or a more tuned query .
create table tab1 (sapid number,
denid number);
create table tab2 (sap_pkid number ,sapid number,
denid number,
[code]...
I am creating a function to sum five numbers (less 1). Is it possible to have an array of numbers in an SQL function, and how would this be implemented?
Here is the screenshot of my output (I cannot embed links until 5 posts!): flic.kr/p/eaSHBP
CREATE OR REPLACE FUNCTION sumfivenumbers ( n1 NUMBER, n2 NUMBER, n3 NUMBER, n4 NUMBER, n5 NUMBER)
RETURN NUMBER
IS
Sumnums NUMBER;
BEGIN
SELECT SUM(n1+n2+n3+n4+n5-1) INTO Sumnums FROM DUAL;
DBMS_OUTPUT.PUT_LINE(Sumnums);
RETURN 1;
END sumfivenumbers;
/
SELECT sumfivenumbers(5,5,5,5,5) AS "Five Numbers less 1" FROM DUAL;
I am trying to create a function that when called will add the salary and commission a certain way to return an employee's annual salary.Here's my code
create or replace function Get_Annual_Comp
(Sal in number, Commission in number)
return number
as
[code]...
When I run the query, I get the proper rows return; however, my function does no calculation. If I input random numbers, I get the proper value returned. What I want is for my function to return the salary and commission of the employee specified in my select's where clause to be calculated as an annual salary.
if function having retrun statement, why we need to use out or inout parameters.
View 16 Replies View RelatedHow can i use the decode function?
for example
I have the value of 1000 then the numbers 50-100 will be 'A' and 1-49 = 'B'?
how to use rowtocol means a query.
View 5 Replies View RelatedDECODE(:P_PERIOD_TYPE,'PJTD','PROJECT-TO-DATE','PTD','PERIOD-TO-DATE','YTD','YEAR-TO-DATE')
what does it mean..
Any way to write a function to parse through a clob and extract certain values to insert into a table. I've written the following and it compiles but it doesn't work.
create or replace function all_fields
(type_field VARchar2,
domain_field VARchar2)
return VARchar2 as
typefield VARchar2(100) :=type_field;
domainfield VARchar2(100) :=domain_field;
[Code]....
CREATE OR REPLACE FUNCTION my_to_date (value_in IN VARCHAR2)
RETURN DATE
IS
TYPE mask_t IS TABLE OF VARCHAR2 (30)INDEX BY BINARY_INTEGER;
fmts mask_t;
[Code]....
When i try using this method i am getting error...
SQL> select my_to_date(to_char(07/11/1987),'yyyy') from dual;
select my_to_date(to_char(07/11/1987),'yyyy') from dual
*
ERROR at line 1:ORA-06553: PLS-306: wrong number or types of arguments in call to 'MY_TO_DATE'
what is the error here...What is the solution for this function.....how to execute this function
When i am using ananymous block i am getting this answer:
SQL> declare
2 v date := '07-nov-1987';
3 u date;
4 begin
[Code]...
PL/SQL procedure successfully completed.
i have one table chequedetails in this 4 rows are there that is
date name sno
1-10-2011 b 1
10-10-2011 c 2
25-10-2011 d 3
11-11-2011 e 4
these records are there in my table in this i selected between date it wil display o/p like this
date name sno
1-10-2011 b 1
11-11-2011 e 2
my query
select * from chequedetails where date between '1-10-2011' and '11-11-2011'
Can we use commit in a function?
View 10 Replies View RelatedI am using lag function to display values like below:
order details date starttime
----------------- -------- --------------
main order 1 07/10/12 06:00am
line 1 07/10/12 06:21am
line 2 07/10/12 06:31am
main order 2 07/11/12 07:00am
line 1 07/11/12 07:01am
line 2 07/11/12 07:02am
the data displays correctly when i use lag function except that the line 1 details are never getting displayed ie first line under every order does not get displayed? is using lag function in this case correct?
I have written a query which basically retrieves id and created date. IF i put MAX function it is returning id which have max created date. But if i use min function this query is not providing id with min created date,its not returning any rows.
SELECT To_char(OSH.osh_id),
OSH.osh_created
FROM tn_order_status_history osh,
tn_order_status_type ost,
tn_orderline_product op
[code]..........
select
DECODE(PAA.C_TYPE_DESC,'TXIS CASUAL LEAVE',NVL(PAA.ABSENCE_DAYS,0)) TCL,
DECODE(PAA.C_TYPE_DESC,'TXIS SICK LEAVE',NVL(PAA.ABSENCE_DAYS,0)) TSL,
DECODE(PAA.C_TYPE_DESC,'TXIS PRIVELEGE LEAVE',NVL(PAA.ABSENCE_DAYS,0)) TPL
from PER_ABSENCE_ATTENDANCES_V PAA
i want to use nvl function within decode function
means if C_TYPE_DESC is 'TXIS CAUSAL LEAVE' it return ABSENCE_DAYS but if ABSENCE_DAYS are null it will be return 0 else it should be return Absence_days
Query:
select sum(2) from employees
How easy it is to tell the answer without running it in SQL Developer or SQL* Plus
I am finding it a bit hard to understand the logic behind allowing Lower(2.3) and Upper(69) etc queries
Can we use NVL Function in a from clause?
SELECT t1, t2, nvl(t3,0) t3 FROM
(select nvl(t1,0), nvl(t2,0),nvl(t3,0) from table1).........
can we NVL here?
i have a function which takes in two variables and return a varchar.
ex: Function(var1,var2) return as varchar2.
in the function,i query a table for var1 and var2 and concatenate the result set to return a varchar. But if either var1 or var2 is null,then my query in the function fetches the result set for the other variable.
My question is,how would i pass a null value through the function and handle it in the function.