SQL & PL/SQL :: Expression Column With A Group By Clause?
Mar 28, 2011
getting expression into a Group By query in oracle.
I have a simple table with two columns. 'ID' and 'Amount'
I want output of the SQL to the following (only 2 fields in the output): I have attached the desired output.
select sum(amountheld) from table1
where member_status = 'MEMBER'
group by ID
This group by query works. But how can i get the expression field (the first field which 'TEMPACCOUNT') in this query (based on my attached output).
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Apr 4, 2011
Can Group BY clause have an expression field?
Say for example, I want to group by the fields "Type" and and expression called "expression" (which is a case statement). I tried running this query and it says "expression" is invalide identifier.
select type, case when SUBSTR (glnumber, 1, 2) = '05' then 'IS'
when SUBSTR (glnumber, 1, 2) = '06' then 'IS'
else 'BS'
end "expression" , sum(balance)
from table
group by TYPE, "expression"
If there is any online material on how to GROUP BY on an expression(like above)
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Jun 23, 2011
I read that rownum is applied after the selection is made and before "order by". So, in order to get the sum of salaries for all employees in all departments with a row number starting from 1, i wrote :
select ROWNUM,department_id,sum(salary) from employees group by department_id
If i remove rownum, it gives the correct output. Why can't rownum be used here ?
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May 17, 2011
Refer to the txt file to create table and insert data.
I executed the following query-
SELECT priority, detail, COUNT(1) FROM TEST GROUP BY priority, detail
and got the following result-
PRIORITYDETAIL COUNT(1)
StandardPatch 27
StandardInitial TSS 1
StandardInitial development 10
StandardProduction deployment5
High PriorPatch 1
Now I want that Initial TSS and Initial development should be combined as Initial together and I should get the result as follows:
PRIORITYDETAIL COUNT(1)
StandardPatch 27
StandardInitial 11
StandardProduction deployment5
High PriorPatch 1
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Apr 1, 2013
when i am running the below plsql block i am getting the error like not a group by expressiong.
DECLARE
CURSOR Cur_st
IS
SELECT DISTINCT
CAST (A.STO_NO AS VARCHAR2 (5 CHAR)) AS BU_CODE,
CAST ('STO' AS VARCHAR2 (3 CHAR)) AS BU_TYPE,
CAST (NULL AS VARCHAR2 (7 BYTE)) AS CUST_NO,
CAST (A.CUR_CODE AS VARCHAR2 (3 BYTE)) AS CUR_CODE,
TO_DATE (A.SALES_DATE, 'YYMMDD'),
CAST (A.RECEIPT_NO AS VARCHAR2 (10 BYTE)),
[code]....
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Jan 3, 2012
I wrote a query for minimum average salary of Job_id using inline view but it is not working..
The query is as follow
SELECT job_id, avg(salary)
FROM employees , (SELECT MIN(AVG(salary)) min_avg_sal
FROM employees
GROUP BY job_id) b
GROUP BY job_id
having avg(salary)=b.min_avg_sal;
It returns error as
################################
having avg(salary)=b.min_avg_sal
*
ERROR at line 6:
ORA-00979: not a GROUP BY expression
#########################
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Oct 13, 2010
I ran into something that has me wondering about which errors are caught at compile-time, and which are caught at runtime. There is a pretty big package with lots of complicated queries that heavily use GROUP BY, and in the last couple of years I thought I never had the case of an ORA-00979 happening an RUNTIME, which is now happening.
The last heavy changes in that package did I make in the Oracle 9.2 days, and I *believe* (although my memory might be wrong) that back then the ORA-00979 errors came up at compile time.
So is it normal that the error doesn't show up during compile time, only during runtime, or should it be considered a bug?
SQL> CREATE TABLE test_tab(a NUMBER(1), b NUMBER(1));
Table created.
SQL> INSERT INTO test_tab VALUES (1,1);
1 row created.
SQL>
SQL> CREATE OR REPLACE PROCEDURE test_prod AS
2 v_a NUMBER;
3 v_b NUMBER;
4 BEGIN
5
6 SELECT a,b
7 INTO v_a, v_b
8 FROM test_tab
9 GROUP BY a;
10
11 END;
12 /
Procedure created.
SQL>
SQL> BEGIN
2 test_prod;
3 END;
4 /
BEGIN
*
ERROR at line 1:
ORA-00979: not a GROUP BY expression
ORA-06512: at "PFK.TEST_PROD", line 6
ORA-06512: at line 2
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Jun 4, 2010
I putted in a table "conditions" some rules (if conditions) and I want to read and execute those conditions in another table "list_parameters" in pl/sql procedure.
conditions :
ID||||||||||||||RULE
1-----------(param1 = F)
2-----------(param2 is null)
.....
list_parameters :
id_task|||||param1|||||param2|||||param3|||||param4
--x-----------F---------Z----------NULL-------NULL
--y----------- ---------A----------K-----------L
.........
How can I use the conditions of clause IF from table "conditions"? Is it possible to do:
CURSOR cur_rules IS select * from conditions;
BEGIN
FOR c1_cur in cur_rules
[Code]....
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Mar 2, 2012
I have a very simple table with 2 columsn. As_of_date is one of the column. This column is "Date" data type.
When I use distinct clause inside a to_char function it gives the following error:
ORA-00936: missing expression
00936. 00000 - "missing expression"
The Sql is
select to_char(distinct(as_of_date),'mm-dd-yyyy') from sales
I can't see any syntax error in the sql..but forsome reason, it doesn't work.
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Feb 23, 2011
I have 2 tables used in this problem: ODETAILS and ORDERS.
ODETAILS has the following columns: ONO, PNO, QTY, COST
ORDERS has the following columns: ONO, CNO, ENO, RECEIVED, SHIPPED, ORDER_COST
UPDATE ORDERS
SET ORDER_COST= 1 * ( select SUM(
SELECT COST
FROM ODETAILS
WHERE ORDERS.PNO=ODETAILS.PNO
)
);
In ODETAILS there can be more than 1 row for 1 order. So I'm trying to add all the COSTs in ODETAILS.
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Mar 31, 2011
This time, I am going to provide the DML statements.
I have a simple table with 3 fields in it.I want to group by ACCT_NUMBER and sum of BALANCE field. But I want to get the description of the first row in a group.
the statements below. Here there are two groups of records 2001 and 2002. My sql(which I am working on) should return the following :
2001 EMPL TRAINING-MIS 20
2002 OTHER PROF SERV-HR 40
The following query will group by ACCT_NUMBER and sum of the BALANCE field. But how can I get the DESCRIPTION?
SELECT ACCT_NUMBER, SUM(BALANCE)
FROM TEST
GROUP BY ACCT_NUMBER
CREATE TABLE "TEST"
("ACCT_NUMBER" VARCHAR2(20 BYTE),
"DESCRIPTION" VARCHAR2(20 BYTE),
[code]...
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Sep 18, 2012
I want to use Analytical function instead of group by clause for below query..
select
CASE
WHEN ADMT.SOURCESYSTEM ='CLU'
THEN COUNT(ADMT.TOTAL_COUNT)*5
ELSE COUNT(ADMT.TOTAL_COUNT)
END TOTAL_COUNT
from ESMARTABC.ABC_DRVR_MFAILS_TMP ADMT
group by ADMT.SOURCESYSTEM
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Mar 31, 2012
This query is taking 7 hours to execute as I am retrieving data from history table dept_hist.
select count(distinct empid), e.group_nm, d.date,
from emp e, dept_hist d
where e.deptno = d.deptno
and e.up_ts > sysdate -30
[Code]...
Its taking 7 hours to execute.restructing this query.
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Oct 31, 2012
I have two columns Department and EmpName:
Department EmpName
____________________________________
Sales empname1
Sales empname2
Marketing empname3
Development empname4
Now I want to count the number of employees in every department. I want the output to be
Department Total
______________________
Sales 2
Marketing 1
Development 1
I am retrieving names of the department through a subquery
The query I am trying to execute is:
SELECT Department, Employee FROM
( SELECT ...query from other table) AS Department, count( A.EmpName) AS Employee
FROM Employer A, EmployeeInfo B
WHERE (A.EmpID = B.EmpID AND A.EmpCategory like 'Category2')
GROUP BY Department
I know that you cannot group by using aliases and hence a little work around, but still the query isn't working.
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Jun 21, 2010
I am running a GROUP BY query on a few columns of enumerated data like:
select count(*), Condition, Size
group by Condition, Size;
COUNT(*) CONDITION SIZE
-------- ---------- --------
3 MINT L
2 FAIR L
4 FAIR M
1 MINT S
Well, let's say I also have a timestamp field in the database. I cannot run a group by with that involved because the time is recorded to the milisec and is unique for every record. Instead, I want to include this in my group by function based on whether or not it is NULL.
For example:
COUNT(*) CONDITION SIZE SOLDDATE
-------- ---------- -------- ----------
3 MINT L ISNULL
2 FAIR L NOTNULL
2 FAIR M NOTNULL
2 FAIR M ISNULL
1 MINT S ISNULL
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Nov 28, 2011
I have a requirement of getting different column value for every select clause. my selection is so much freequent. For example.. 10 Select statement /second.
But when if I am running more than select in a second its is showing the same record which is last dequeue.and also tried with RANDOM(). how to get different value for every statement which is running in single point of time.
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Sep 24, 2013
i have in tb1 data like and i need the latest status changed date : when date on which the status of the task changes.for the data below for taskno :
1 i need to get the o/p : 1/2/2013and for taskno :
2 I need the o/p 1/4/2013 taskno :
upd_dateold_status new_status11/1/2013openWIP11/2/2013WIPClosed11/3/2013closed closed21/1/2013openWIP21/2/2013WIPmore_info_needed21/3/2013more_info_neededWIP21/4/2013WIPclosed im writing the query as below select taskno, max(upd_date) MAX_UPD_DATE from (select taskno, upd_date, old_status, new_status, rank from (select taskno, upd_date, old_status, new_status, rank() over (partition by taskno, old_status, new_status order by upd_date asc) as rankfrom tb1)where rank = 1and old_status <> new_status)group by taskno;
IS there any more efficient way to write this query as the clause "old_status <> new_status" is taking a toll on the performance
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Aug 10, 2011
I have the following query:
SELECT AGENCY, COUNT(*)
FROM (SELECT A.AGENCY,SUM(A.NUM_LOGIN)
FROM GOVAGENCY A
WHERE AGENCY = 'DOD1'
GROUP BY A.AGENCY
[code].......
The results are:
AGECNY COUNT(*)
-------- -----------
DOD1 1
DOD2 1
2
The rollup value has a blank label instead I want to have a label to the rollup result also ex:
AGENCY COUNT(*)
--------- -----------
DOD1 1
DOD2 1
DEPT. OF DEFENSE 2
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Sep 27, 2010
I have a table emp where empid,employee name,job,salary are three columns.I need to retrieve empid,count of emp,emp name,emp salary of job = manager and total salary of all employees with grouping by job in one query.
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Sep 28, 2012
I am new to PL/SQL environment.. ( USING PL/SQL Oracle)
SELECT TABLE1.PRODUCTID, TABLE1.TYPE , TABLE1.PRODUCT, TABLE2.#SOLD
FROM TR.TABLE1
INNER JOIN
PR.TABLE2
ON (TR. PRODUCTID = PRODUCTID )
Query result.
Product ID Product Type #Sold
1 Fruit Banana 2
2 Food Rice 4
3 Food Sugar 6
4 Fruit Orange 2
5 Fruit Apple 10
6 Food Sugar 12
7 Food Corn 3
8 Fruit Apple 5
9 Fruit Banana 2
10 Food Sugar 1
11 Fruit Banana 5
12 Food Sugar 7
But would like to add Four More Column and group by by PRODUCT.Final Result will look like :
{Product} , {Type} , {#Sold} , 0 to 3 , 4 to 9 , >10 Total Sold
, {Corn} , 3 , , ,
, {Rice} , , 4 , ,
, {Sugar} , , , , 26
{Food} , , , , , 33
, {Apple} , , , , 15
, {Banana} , , , 9 ,
, {Orange} , , 2 , ,
{Fruit} , , , , , 36 }
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Aug 11, 2011
I need to know if it is possible to hide one or more of the columns in my SELECT statement as I only need them in there where clause.
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Nov 3, 2012
Oracle version : 11.2.0.2 Linux EL6 server
I have a query like below:
select col1, col2, col3, col4
from tab1, tab2, tab3
where conditions
union
[Code]...
Now, the col4 is a date column and I have to order by the entire result sets on it. I know I can do it by (order by col4) or by (order by 4) at the end of the entire query.
But the problem is that, the output is coming in dd-Mon-yyyy (i.e 31-Nov-2012).
I want every output in dd/mm/yyyy format so I need to use to_char function.
But in that case, I cant use the order by clause, because in that case it is getting arranged by character i.e by 1,2,3,4,5 like this.
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Feb 2, 2010
earlier the query was running on same record group but i hav to delete some code so i did but after made such changes itreturns this error.but still query is correct i complied on toad.
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Dec 22, 2010
ved>create table test900 ( a number, b number);
Table created.
ved>insert into test900 values( 9,'');
1 row created.
ved>insert into test900 values( 10,null );
1 row created.
ved>select * from test900;
A B
---------- ----------
9
10
ved>select nvl(length(b),0) from test900;
[code]....
ERROR at line 1:
ORA-01790: expression must have same datatype as corresponding expression..Why the above sql ( case 2 ) gives error?
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Oct 1, 2011
I found nothing in SQL (all in PL/SQL).I have a table:
create table Parent (pk_id number primary key); --which is filled using sequence seq_Parent.
And I have a child table:
create table Child (rRef number, fk_parent number primary key (rRef, fk_parent);
that I need to insert into Child using seq_parent but I want to insert the same sequence for each group of rRef. I dont know how to do that using SQL not PL/SQL.
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Aug 16, 2011
i want to select columns of 3 tables in such a way that period column should be in the group by function.
create view allocated_budgets_detail as
select ba.ba_fin_year, ba.ba_start_date, ba.ba_end_date, ba.ba_rev_no,
bh.bh_budget_code,
bd.bd_period,
bb.bb_entered_amount
from budget_header bh, budget_allocation ba, budget_distribution bd, budget_balance bb
where bh.bh_budget_id = ba.ba_budget_id
and ba.ba_line_id = bd.bd_budget_line_id
and ba.ba_line_id = bb.bb_budget_line_id
group by bd.bd_period
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Jan 28, 2011
I came across situation where a Nullable column is not using index for 'order by' clause. I added Not Null condition in the 'where' condition but it wasn't useful. I don't wanted to make composite index with not nullable column or with constant or modify column to 'Not Null'
So I carried out test cases and during which I found that in one case the sql statement does 'fast full scan' for data access but does not use index for 'order by' sorting
here are the steps
Initially I kept the column Nullable
SQL> create sequence s5;
Sequence created.
SQL> create table t5 as select s5.nextval id,a.* from dba_objects a where rownum<1001;
Table created.
SQL> set pages 100
SQL> select column_name,nullable from user_tab_columns where table_name='T5';
SQL> create index i5 on t5(id);
Index created.
SQL> exec dbms_stats.gather_table_stats(user,'T5',cascade=>true);
PL/SQL procedure successfully completed.
exit
SQL> alter session set events '10046 trace name context forever, level 12';
select *
from
t5 where id is not null order by id
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 68 0.00 0.00 0 16 0 1000
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 70 0.01 0.00 0 16 0 1000
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 5
Rows Row Source Operation
------- ---------------------------------------------------
1000 SORT ORDER BY (cr=16 pr=0 pw=0 time=4771 us)
1000 TABLE ACCESS FULL T5 (cr=16 pr=0 pw=0 time=1157 us)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 68 0.00 0.00
SQL*Net message from client 68 49.49 49.72
********************************************************************************
select /*+ index(t i5) */ *
from
t5 t where id is not null order by id
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 68 0.00 0.00 0 150 0 1000
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 70 0.00 0.00 0 150 0 1000
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 5
Rows Row Source Operation
------- ---------------------------------------------------
1000 TABLE ACCESS BY INDEX ROWID T5 (cr=150 pr=0 pw=0 time=5167 us)
1000 INDEX FULL SCAN I5 (cr=71 pr=0 pw=0 time=3141 us)(object id 4673065)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 69 0.00 0.00
SQL*Net message from client 69 22.89 28.04
Now I modified the 'id' column to Not Null
SQL> alter table t5 modify id not null;
SQL> set pages 100
SQL> select column_name,nullable from user_tab_columns where table_name='T5';
COLUMN_NAME N
------------------------------ -
ID N
OWNER Y
OBJECT_NAME Y
SUBOBJECT_NAME Y
OBJECT_ID Y
DATA_OBJECT_ID Y
OBJECT_TYPE Y
CREATED Y
LAST_DDL_TIME Y
TIMESTAMP Y
STATUS Y
TEMPORARY Y
GENERATED Y
SECONDARY Y
14 rows selected.
select *
from
t5 order by id
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.01 0 29 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 68 0.00 0.00 0 16 0 1000
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 70 0.01 0.01 0 45 0 1000
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 5
Rows Row Source Operation
------- ---------------------------------------------------
1000 SORT ORDER BY (cr=16 pr=0 pw=0 time=2398 us)
1000 TABLE ACCESS FULL T5 (cr=16 pr=0 pw=0 time=1152 us)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 68 0.00 0.00
SQL*Net message from client 68 37.74 37.91
********************************************************************************
select /*+ index(t i5) */ *
from
t5 t order by id
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 68 0.00 0.00 0 150 0 1000
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 70 0.00 0.00 0 150 0 1000
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 5
Rows Row Source Operation
------- ---------------------------------------------------
1000 TABLE ACCESS BY INDEX ROWID T5 (cr=150 pr=0 pw=0 time=4166 us)
1000 INDEX FULL SCAN I5 (cr=71 pr=0 pw=0 time=3142 us)(object id 4673065)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 68 0.00 0.00
SQL*Net message from client 68 8.28 8.45
select id
from
t5 order by id
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 68 0.00 0.00 0 6 0 1000
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 70 0.00 0.00 0 6 0 1000
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 5
Rows Row Source Operation
------- ---------------------------------------------------
1000 SORT ORDER BY (cr=6 pr=0 pw=0 time=1342 us)
1000 INDEX FAST FULL SCAN I5 (cr=6 pr=0 pw=0 time=1093 us)(object id 4673065)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 68 0.00 0.00
SQL*Net message from client 68 1.88 1.89
Questions are
1) Why adding 'where id is not null wasn't enough for the index to get used in 'order by'?
2) While we got 'fast full scan' why index wasn't used for 'order by' clause?
3) Do we need the indexed column in where clause for being used in 'order by clause' too?
4) Do we need 'order by' clause if we are selecting only the indexed column with sequence generated values?
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Dec 14, 2010
I have a report with 2 groups Gheader and Glines.The report looks at PO headers and lines. I want to create a data link from the the 2 queries based on the line id in po_lines_all.However I only want to select this in the lines query so I do not get repeating records at the header query.
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Nov 1, 2013
I'm trying to group sets of data based on time separations between records and then count how many records are in each group.
In the example below, I want to return the count for each group of data, so Group 1=5, Group 2=5 and Group 3=5
SELECT AREA_ID AS "AREA ID",
LOC_ID AS "LOCATION ID",
TEST_DATE AS "DATE",
TEST_TIME AS "TIME"
FROM MON_TEST_MASTER
WHERE AREA_ID =89
AND LOC_ID ='3015'
AND TEST_DATE ='10/19/1994';
[code]....
Group 1 = 8:00:22 to 8:41:22
Group 2 = 11:35:47 to 11:35:47
Group 3 = 15:13:46 to 15:13:46
Keep in mind the times will always change, and sometime go over the one hour mark, but no group will have more then a one hour separation between records.
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Mar 3, 2011
I have a table with around 80 columns. All i need is to select first 40 columns.
Is there any way to select first 40 columns without giving all the 40 Column Names in select clause.
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