SELECT COUNT(*) FROM APP.Big_table; Number of record--222653402
This is a big table to get the it's taking 8 minutes time, so that I tried the following SQL to get the count quickly.
SELECT num_rows FROM all_tables WHERE table_NAME='BIG_TABLE'
and owner='APP'; --Number of records 237213998
But I got the different count for the two SQLs. Why there is a difference in the count. Which one is correct.
SELECT COUNT(*) FROM APP.Big_table; Number of record--222653402
This is a big table to get the it's taking 8 minutes time, so that I tried the following SQL to get the count quickly.
SELECT num_rows FROM all_tables WHERE table_NAME='BIG_TABLE'
and owner='APP'; --Number of records 237213998But I got the different count for the two SQLs. Why there is a difference in the count. Which one is correct.
Detail table will look like below:
Product_id issue_date action_date Force_date
1 10/10/2012 10/10/2012 10/10/2012
2 10/10/2012 10/10/2012 10/10/2012
3 10/10/2012 13/10/2012 15/10/2012
[code]....
Need the data like
Issue_date count_action_date count_Force_date (diff(action_date,force_date) 1 2 3 4 5 6(days since over)
10/10/2012 3 4 1 4 2 1 0 0
How to get the data like this? automatically how to get 123.... and how to calculate the difference by which day the count of difference is going?
What is the Difference between a Stand Alone Function/Procedure & a Function/Procedure declared in a Package.
View 2 Replies View RelatedWhen we execute select count(*) from table_name it returns the number of rows.
What does count(1) do? What does 1 signifies over here? Is this same as count(*) as it gives the same result on execution?
difference between count(1) and count(*). As i know count(*) will give number of rows irrespective of null and count(1) will not count the null.My Oracle version is 10 g.
SQL> select * from t1;
A B C
---------- -------------------- --------------------
1 2 3
2
5
SQL> select rownum,a.* from t1 a;
ROWNUM A B C
---------- ---------- -------------------- --------------------
1 1 2 3
2 2
3 5
4
[code]....
I am trying to get a record count of this table and i get 2 different output , select count(*) shows 68560 and after updating the stats the NUM_ROWS shows 68323, why the difference .
SQL> select count(*) from dcepcd;
COUNT(*)
----------
68560
SQL> select num_rows from dba_tables where table_name='DCEPCD';
NUM_ROWS
----------
68323
Find the date difference. I need to find that how many days the task is pending, if ACT_NAME field switching from 'SET PENDING%' to 'RESUME PENDING%' by using ACTIONTAKENDATETEXT field in the History table.
Example as needed:
NoPendingDays = 23 (8+15)
I have attached Create table and Insert table values sample as SQL file.
I know difference between procedure and function.if we want a return value from procedure, we can have OUT parameter. Similarly with function, in addition to returning a value from function, it can also send an OUT parameter value as a return value. That means, in one or the other way we are able to get a return value from both program units. Normally, I would fill a OUT variable with error message when an exception occurs. I use this varaible,after procedure call, to detect if an exception occurred or not. Similar task can be performed by a function, it returns a true/false and a value thru OUT variables.
both program units return values in the form of OUT parameters. Where exactly should we use a function, where exactly should we use a procedure?
difference between Procedure and Function.We Know that Procedure is Basically Used to perform Actions and Functions are Basically Used for Calculations but what would be the exact difference since Actions/Calculations can be done in both Procedure and Functions.Which factors decide whether we need to write a Procedure and in which cases we need Function.
View 4 Replies View RelatedThere is a table with column holding 3 NULL values one each in every record. When a count function is applied to the column with a filter on NULLs,it returns 0 instead of 3.
But when count(*)is applied,expected result is returned. Would be interested in knowing about this strange behavior of NULL/Count.
I am trying to get a row count(*) for all the tables in my schema. The NUM_ROWS column in DBA_TABLES is not appropriate in this case because they are as good as the last analyze. So I need to get real time counts.
I tried the following code but I can't seem to catch my error.
DECLARE
l_sql varchar2(150);
cursor tablelist is
select table_name from dba_tables where owner = 'ME';
[Code]....
My expected results are :
TABLE_NAME ROW_COUNT
---------- ----------
I have to call oracle stored procedure or a function to update user id of one or several rows depending on what user selects.
The oracle person will be writing the stored procedure or function. I am a java developer but was never involved in writing oracle functions. So..
I want to know what is the difference betn stored procedure and function?
From java point of view are there any guidelines when to prefer one over the other(betn stored procedure and function).
Want to understand difference between Concat function and "||" operator. I am getting the same result for both. Below is the test case for your reference.
Select 'H '||' S' From Dual;
--Output H S
Select Concat('H ',' S') A From Dual;
--Output H S
Select Length('H '||' S') A From Dual;
--Output 6
Select Length(Concat('H ',' S')) A From Dual;
--Output 6
Explain with the best example for difference between translate and replace function.
View 2 Replies View RelatedOur stats are collected at the schema level as follows:
EXEC DBMS_STATS.gather_schema_stats('schema', estimate_percent => 15, degree => 8 )
However, when I compare the num_rows in user_indexes to the num_rows in user_tables, for some indexes I am getting zero rows but over 100k rows in the table.I can see from the last_analyzed col on user_indexes that stats were gathered within seconds of the stats being collected on the tables.
create or replace function getDate(p_joing_date Date,p_sysdate)
Return Date;
IS
v_compltd_mnths;
BEGIN
SELECT into v_compltd_mnths MONTHS_BETWEEN(TO_DATE('sysdate','MM-DD-YYYY'), TO_DATE('joing_date','MM-DD-YYYY') ) "Months"FROM DUAL;
return v_compltd_mnths;
END;
that i have worte..
I have the following query with analytic function but wrong results on the last column COUNT.
1)I am getting the output order by b.sequence_no column . This is a must.
2)COUNT Column :
I don't want the total count based on thor column hence there is no point in grouping by that column. The actual requirement to achieve COUNT is:
2a -If in the next row, if either the THOR and LOC combination changes to a new value, then COUNT=1
(In other words, if it is different from the following row)
2b-If the values of THOR and LOC repeats in the following row, then the count should be the total of all those same value rows until the rows become different.
(In this case 2b-WHERE THE ROWS ARE SAME- also I only want to show these same rows only once. This is shown in the "MY REQUIRED OUTPUT) .
My present query:
select r.name REGION ,
p.name PT,
do.name DELOFF,
ro.name ROUTE,
[code]...
My incorrect output[PART OF DATA]:Quote:
REGIONPT DELOFF ROUTE THOR LOC SEQ COUNT
NAASNAAS MAYNOOTHMAYNOOTHR010 DUBLINRD CEL 1 1
NAASNAAS MAYNOOTHMAYNOOTHR010 NEWTOWNRD CEL 2 1
[code]...
My required output[PART OF DATA]-:Quote:
REGIONPT DELOFF ROUTE THOR LOC COUNT
NAASNAAS MAYNOOTHMAYNOOTHR010 DUBLINRD CEL 1
NAASNAAS MAYNOOTHMAYNOOTHR010 NEWTOWNRD CEL 1
NAASNAAS MAYNOOTHMAYNOOTHR010 PRIMHILL CEL 1
[code]...
NOTE :Count as 1 is correctly coming.But where there is same rows and I want to take the total count on them, I am not getting.
difference between Difference between Deterministic functions and Function result cache in 11g?
View 4 Replies View RelatedI have 2 tables, ASSIGNMENT and RESEARCH_PAPER. For each research paper, I need to find out :
1. The number of assignments created from it (after a given constant assign date)
2. The number of assignments created from it that have been approved.
3. The number of unique users who have either created or approved an assignment from it
Test data :
create table research_paper (id int, name varchar2(100));
create table assignment (id int, r_paper_id int, assigner_id int, assignee_id int,
approver_id int, assign_date timestamp, approved_yn varchar2(10));
insert into research_paper values (1, 'A');
insert into research_paper values (2, 'B');
[code]....
Assignment :
id r_paper_id assigner_id assignee_id approver_id assign_date approved_yn
-----------------------------------------------------------------------------------------------------------
11 100 200 100 23-10-12 12:00:00.000000000 AMY
22 200 100 200 22-10-12 12:00:00.000000000 AMN
32 100 200 101 24-10-12 12:00:00.000000000 AMY
[code]....
Research_paper:
id name
----------
1A
2B
Expected result :
r_paper_id created approved unique_users
-----------------------------------------------
1 3 2 4
2 3 2 3
I wrote the following query for that :
SELECT rp.id r_paper_id,
COUNT(*) created,
COUNT(
CASE
WHEN a.approved_yn = 'Y'
[code]....
But it fails, saying that 'single-row subquery returns more than one row' when I introduce the 'unique_users' clause. The remaining fields of the output are correct.
know when to use a formula column and when to use a function in program unit in oracle reports.
View 1 Replies View RelatedIs 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]....
I have the folloiwng two queries:
Query_1: select count(*) yy from table1;
Query_2: select count(*) zz from table2;
I need to compute the following:
var:=(yy/zz)*100
How can I achieve this in a single query?
I'm using this code, and it performs fine, but I'm wondering if there is a more elegant way to do it--maybe with "ROLLBACK". Basically (as you can see) I need to get a normal count for each group but also for each group take a percentage of the total count (so all groups pct adds up to 100 (oh yeah, don't test for zero below, but just a test... )
select
c.Event,
c.code,
count(1) as calls,
total.total_count,
count(1) / total.total_count * 100 as pct_of_total
from
table1 c
[Code]....
[Edit MC: add code tags, do it yourself next time]
What 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 one tbale like
TABLE A with columns bu_code and bu_cty
bu_code bu_cty
12 ES
12 ES
13 AP
13 AP
so now i want to know the count for bu_code
like my output shd be
bu_code(12) ---count is 2
bu_code(13)------count is 13
I have this query and I want to get the COUNT:
SELECT first_np AS n_p FROM dvc
UNION
SELECT second_np AS n_p FROM dvc
UNION
SELECT n_p FROM dc;
This returns one column which is the n_p; how do I get the count of n_p?
say there is astring "mumbojumbo "i need the count of given string in it
ex:when o is given count shuld be 2 when m is given count shuld be 3
is there any pre defined function for counting a given string ...
I have a table with the following fields :
RGS_CAN_PERIOD NUMBER(4)
RGS_ID_ELECTOR NUMBER(
FBD_NID VARCHAR2(14)
RGS_SURNAME VARCHAR2(40)
RGS_O_NAME VARCHAR2(40)
RGS_ALIAS VARCHAR2(30)
RGS_ADDR VARCHAR2(75)
RGS_ID_REG_AREA VARCHAR2(3)
[Code]..
I need a report as hereunder :
Reg. Area Age <=19 20 <= Age <= 24 25 <=Age <= 29 Total No. of Voters
xxxx 10 15 7 32
yyyy 5 7 3 15
I have work out a script but the age is not in a range
select *
FROM (select rgs_id_reg_area,
count(decode(fbd_age,19,fbd_age)) Age19,
count(decode(fbd_age,20,fbd_age)) Age20
FROM rubyvoterstat where vote ='Y'
GROUP by rgs_id_reg_area)
order by rgs_id_reg_area