SQL & PL/SQL :: Select Statement And Tuning Not Working?
Jun 24, 2010
Tried several different ideas today and nothing worked to make a PL/SQL query run faster or detect when an item is missing appropriately. . I'm trying to write a statement that matches 2 fields, but then I have the third field that has multiple results and I need to be able to see if any of those results is a yes.
I have a several million record table with about 15 fields, but created a new smaller table to get only the 3 fields I needed, and removed dups (7000+ recs).
I have an output number repeated about 30K times.
I have stock numbers and they are repeated in each of the output lines.
I have another field, that's Yes, No or Maybe for something being on the shelf.
I tried indexing all 3 columns
output stock # shelf
--------------------------------------------------------------------------------
1 x5323 Yes
1 p2323 No
2 x5323 No
I have a list of unique stock numbers that include output numbers that I want to check and see if they were on the shelf for that particular output run. I put those in a cursor. There are about 100 of them. The idea was to do a for loop thru the cursor, and if I didn't find the item in the smaller table I created, write that to a file. Problem is, detection isn't always correct and it takes forever to run.
I've tried to explain (to the non technical people) that this may be something that takes awhile, because I'm looking at 100 original stock numbers that have to go through the smaller table of 7000 records to find the match. I'm matching on output number for both the cursor and table, and stock number for cursor and table. Code below:
cursor cr_stocknums is select unique stocknums, outputnums from large_table.
I created table check_table, create table check_table as select outputnums, stocknums, shelf from large_table.
Then I tried things like exists, not exists, etc. in a for loop. Nothing worked.
for i in 1..tot_stock_nums
loop
select unique stocknum (tried stocknum alone, also tried select 1, in the where clause I tried where exists)
into variable_name
from check_table
We have a person running a query and following is the explain plan
explain plan for
select distinct(extractvalue(xmltype(a.email_variables), '/CalliopeData/Attributes/HOTEL_BRAND')) as ThisBrand from hh.t_ecomm_mem_relations a where extractvalue(xmltype(a.email_variables), '/CalliopeData/Attributes/HOTEL_BRAND') not in (select b.code_brand from hh.t_pr_brand b) and a.code_corr_ecat = 'PREA' and a.status = 'S' and a.audit_time > sysdate - 1 ;
PLAN_TABLE_OUTPUT ------------------------------------------------------------------------------------------------------------------------------------ Plan hash value: 1904775187
I'm working on a query that will show how many differents SKUs we have on-hand, how many of those SKUs have been cycle-counted, and how many we have yet to cycle-count.I've prepared a sample table and data:
What I also want to do is select another column that will group by sku.abc and count the total number of A, B, and C SKUs where the lot.qty is > 0:
SELECT sk.abc AS "STRATA", COUNT (DISTINCT sk.sku) AS "Total" FROM sku sk, (SELECT sku FROM lot WHERE qty > 0) item WHERE item.sku = sk.sku(+) GROUP BY sk.abc
Finally, I need the last column to display the DIFFERENCE between the two totals from the queries above (the difference between the "counted" and the "total"):
In the following merge statement in the USINg clause...I am using a select stament of one schema WEDB.But that same select statement should take data from 30 schemeas and then check the condition below condition
ON(source.DNO = target.DNO AND source.BNO=target.BNO);
I thought that using UNIONALL for select statement of the schemas as below.
I have two tables with 113M records in DWH_BILL_DET & 103M in prd_rerate_chg_que and Im running following merge query, which is running for 13 hrs to update records, which is quiet longer time.
SQL> explain plan for MERGE /*+ parallel (rq, 16) */ INTO DWH_BILL_DET rq USING (SELECT rated_que_rowid, detail_rerate_flag_code, rerate_sel_key,
I am using JDBC to run a few queries from my Java program (multi-threaded one).I am facing an issue where a select statement is blocking a delete statement. From the java code point of view, there are 2 different threads accessing the same tables (whith different DB connection objects).
When the block occurs (which i was able to find out from the java thread dump that there is a lock on oracle), the below is the output:
SQL> SELECT TO_CHAR(sysdate, 'DD-MON-YYYY HH24:MI:SS') 2 || ' User '||s1.username || '@' || s1.machine 3 || ' ( SID= ' || s1.sid || ' ) with the statement: ' || sqlt2.sql_text ||' is blocking the SQL statement on '|| s2.username || '@' 4 5 || s2.machine || ' ( SID=' || s2.sid || ' ) blocked SQL -> ' 6 ||sqlt1.sql_text AS blocking_status FROM v$lock l1, v$session s1, v$lock l2 , 7 v$session s2,v$sql sqlt1, v$sql sqlt2 8 WHERE s1.sid =l1.sid 9 AND s2.sid =l2.sid AND sqlt1.sql_id= s2.sql_id AND sqlt2.sql_id= s1.prev_sql_id AND l1.BLOCK =1 10 AND l2.request > 0 AND l1.id1 = l2.id1 AND l2.id2 = l2.id2; [code]...
From the above it can be seen that a select statement is blocking a delete. Unless the select is select for Update, it should not block other statements is not it ?
I have a query with FULL hint that is behaving in a strange manner. The query fetches around 700000 of data. Sometimes it fetches the data with the hint and sometimes it does not fetch any data with the hint and then I have to remove the hint and have to fetch the data. Below is the query,
Oracle UNION ALL performance issue: when I try to run below SQL query separately SQL part1 and SQL part2 it takes some seconds only but if I run together with group by and without group by it take much time.
SELECT AVG(date_completed-login_date),to_char(to_date(login_date), 'YYYY') as wYear FROM ( SELECT test.date_completed 'date_completed',sample.login_date 'login_date') FROM sample test where (some conditions) ) ---SQL part 1 UNION ALL
I'm trying to demonstrate the working of the OCI client result cache. I've set some parameters,orcl> sho parameter result_cache
NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ client_result_cache_lag big integer 3000 client_result_cache_size big integer 1000000 result_cache_max_result integer 5 result_cache_max_size big integer 1984K result_cache_mode string FORCE result_cache_remote_expiration integer 0
If I understand the docs correctly, that should be all that is needed.I've complied and run the cdemoqc and cdemoqc2 OCI demos, but I never get anything in the V$CLIENT_RESULT_CACHE_STATS or CLIENT_RESULT_CACHE_STATS$ views. This is probably because the sessions exit after running the queries.
So I've also tried repeating arbitrary queries through cdemo2, which gives a persistent session, but there is still nothing in those views and furthermore the v$result_cache_objects.scan_count for my queries keeps increasing. So I don't think think the client side cache is working.
I have a question about select statements, as I am new to them and don't know how to work all the commands yet.
I'm making a select statement that is about half right... it is shown below:
select t.warehouse_id, t.quantity_on_hand, c.product_name from pahtest3.inventories t join pahtest3.product_information c using (product_id) WHERE warehouse_id in (7);
I need to take this select statement and make it so it shows all the products that don't have any quantities in the warehouse in addition to the ones that are already being shown in that select statement.
how to set the timing on for all SELECT statements in a procudeure...and i want that should come as a output for very SELECT statement slong with my original output.
I have a need to use the Alias name of a column within the same select statement( because I can't have another select statement using the first select as table - BO tool limitation).
Ex:
Select dept_id, agency, sum(quantity) as "sum_qty" where sum_qty > 500;
Currently oracle won't allow using alias name Sum_qty in the same select statement. Is there a way to use alias within the same select statement?
I'm trying to write a simple query so I can do some testing on my application. I am trying to do something like this:
SELECT Location, LEVEL,
FROM S_ORG_EXT
where Location = 'North America' and LEVEL ='Software' OR location = 'North America' and Active = 'N'
in the where statement, I have put in the 'Active' that isn't a column. I want to be able to be able to change that in the select part. But I am not able to do so.
this is what I have tried: SELECT Location, LEVEL, Active = 'N' --I want to change this in the to N or Y so I can get different results.
FROM S_ORG_EXT
where Location = 'North America' and LEVEL ='Software' OR location = 'North America' and Active = 'N'
insert into lookups values ('Rent' , 500); insert into lookups values ('Breakpoint' , 10);
create table products (id number, cost number, year varchar2(4));
insert into products values (1, 1000, '2011'); insert into products values (1, 2000, '2011'); insert into products values (2, 100, '2011'); insert into products values (3, 50, '2011');
commit;
I want to write a query which lists the IDs and the sum(cost), and a Y/N indicator which is set to 'Y' IF sum(cost) > ( (lookups.rent value) * (100 - lookups.breakpoint value))/100
I have written this query:
SELECT id, sum(cost)cost, year, CASE WHEN cost > ((SELECT amount [code]....... ORDER BY id;
This returns
ID COST YEAR YN --------- ---------- ---- - 1 1000 2011 Y 1 2000 2011 Y 2 100 2011 N 3 50 2011 N
The YN is correct, but it needs to sum the amounts. So there should only be one row for id1 = 3000.e.g.
ID COST YEAR YN --------- ---------- ---- - 1 3000 2011 Y 2 100 2011 N 3 50 2011 N
I am not sure how to do this. Or is there a better way of doing this than using CASE.
Quote: select a.contact, b.db_name from MOM.db_contacts@DB_LINK a, MOM.databases@DB_LINK b, where a.DB_ID=b.DB_ID and b.DB_name=(SELECT unique substr(upper(t.target_name), 1, instr(t.target_name,'_',1,1)-1) FROM mgmt_targets t JOIN mgmt_current_severity s ON s.target_guid = t.target_guid WHERE t.target_type = 'oracle_database' and UPPER(t.target_name) like '%11GDB%');
How can I add two more columns into the select statement and the two columns are in the tables that were in the sub query..I would like to have something like this:
Quote: select a.contact, b.db_name, COLUM1, COLUMN2 from MOM.db_contacts@DB_LINK a, MOM.databases@DB_LINK b, mgmt_targets t, mgmt_current_severity s where a.DB_ID=b.DB_ID and b.DB_name=(SELECT unique substr(upper(t.target_name), 1, instr(t.target_name,'_',1,1)-1) FROM mgmt_targets t JOIN mgmt_current_severity s ON s.target_guid = t.target_guid WHERE t.target_type = 'oracle_database' and UPPER(t.target_name) like '%11GDB%');
I have a cursor in a procedure that selects columns from a table on a remote Oracle database using a database link. It all works fine when the table name and database link name is 'hard coded' into the procedure but what I would like to achieve is have the select statement lookup the table name and database link name from a column in another table. See example below
CURSOR c_total_bookings IS SELECT personnel_id, surname, forenames, birth_date,
[code]...
What I would like to do is replacecompany_bookings@remote.linkwith a variable that takes its value from another table.
I was given a SQL query to develop another query that will need to do something similar. The query I was given I believe is a stored procedure. It is PL/SQL and has a SELECT statement that looks like
SELECT :var1 AS var1 FROM t1 WHERE :var1 = 1
In the past I have seen where variables can be used in the WHERE clause like
SELECT c1 FROM t1 WHERE c1 = :my_column_valueand this makes sense to me.
Usually :my_column_value is declared in the DECLARE block of the PL/SQL. In the query I was given, :my_column_value is not declared in any DECLARE blocks (maybe I wasn't given the entire code??). But even if it was, that would be even more confusing because in the DECLARE block it could be assigned one value and then set to another value in the WHERE clause???
The first query doesn't make sense to me and when I run it as plain SQL I get an error like "SP2-0552: Bind variable "var1" not declared. I am guessing that such a syntax is not valid for regular SQL?
The only thing I can gather that the first query does is something along the lines of
SELECT 1 as var1
so it will output a 1 for every row. Not always that interesting of a query, but it is needed sometimes, I know. But I still don't understand this type of assignment.
So what's going on here? I'd be happy to look it up and read about it myself, but I don't know what to search for.
i want a select statement to retrieve the last name added into the "ename" column .i mean :if i insert "jack" into "ename" column , i want to write a select statement to retrieve that last name while i do not know it is jack or any other name ?
