I have a table TEMP_TEST_1 to be loaded with multiple rows which contains the available items for a store with their sequence numbers. I also have another table TEMP_INV_1 which holds a column for inventory count of the items, and this column is to be updated after loading the first table TEMP_TEST_1.
The table TEMP_TEST_1 is updated through all possible channels in OLTP. So while updating the inventory, which is the best way. My update should either add the total number of inserts per item into the TEMP_TEST_1 table's INVENTORY_CNT column i.e. existing value + count of new rows OR a full update by taking the complete row count (Grouped by item id) and update the INVENTORY_CNT column
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-- Initial setup SQL's, TEMP_TEST_1 is updates on OLTP through multiple channels
--------------------------------------------------------------------------------
CREATE TABLE TEMP_TEST_1 ( ITEMID NUMBER ( 4 ),
INVENTORY_CNT NUMBER ( 2 ) );
CREATE TABLE TEMP_INV_1 ( ITEMID NUMBER ( 4 ),
ITEMSEQ NUMBER ( 5 ) );
INSERT INTO
[code].......
--------------------------------------------------------------------------------
-- Inserts for new items in the store
--------------------------------------------------------------------------------
INSERT INTO
TEMP_INV_1
VALUES
( 1,
11 );
INSERT INTO
TEMP_INV_1
[code].......
I have a large table and want to calculate just a few values. Therefore, I don't want to create a new table, I want to update the table. Here an example:
I want to calculate the VALUE_LAG with ID = 4 only (-> two values).
create table zTEST ( PRODUCT number, ID number, VALUE number, VALUE_L1 number );
[Code]..
I tried this, but obviously, windows functions are not allowed in the update statement.
update zTEST set VALUE_L1 = lag(VALUE) over (partition by PRODUCT, order by ID) where ID = 4
UPDATE t_tt_hours a SET a.sak_request = ( SELECT b.sak_request FROM t_requests b, co c
[Code]...
The problem I am having is that it is updating all rows even when it is pulling back a null value for b.sak_request. I've tried adding b.sak_request is not null to the select statement like this:
UPDATE t_tt_hours a SET a.sak_request = ( SELECT b.sak_request FROM t_requests b, co c WHERE b.nam_eds_tracking_id = c.id_dir_track_eds
[Code]...
but it doesn't seem to make a difference. The reason I need to do this is that the difference between where it matches with a valid (non-null) value is 396 rows vs. 12,484 rows which is too time consuming to run on my page.
i am reading the columns value from different table but i want to update it with single update statement. such as how to update multiple columns (50 columns) of table with single update statement .. is there any sql statement available i know it how to do with pl/sql.
I am trying to write an update statement which updates the User IDs in one table with the User IDs in another table. However I need to update statement to ignore any duplicates that are in the tables.
I have to create/configure the environment for the database having high volume of the transactions nearly 10000 transactions per day and at peak time nearly 1500 transactions per second.
RAC can be one of the solution but that comes up with high cost. I googled for this type of environment configuration, what could be possible settings need to be configured for this environment configuration in both RAC and Non-RAC.
I am trying to enable OLTP compression on tables and at tablespace level for the tables
Steps I am following are:
1. Move indexes to its own tablespace 2. enable OLTP compression at table level: alter table table_name move compress for OLTP 3. Rebuild indexes 4. Issue I have is what to do with tables with LOB columns ALTER TABLE lob_table MOVE LOB (LOB_COL) STORE AS (TABLESPACE index_tbsp); -- Is this correct? 5. alter tablespace data_tablespace default compress for OLTP;
I have a question, is the sequence of steps correct. For tables with LOB columns do we needto move lobindex to index tablespace. Beacuse lobsegment and lobindex are created in data tablespace?
create table zTEST ( PRODUCT number, ID number, Flag number, FLAG_L1 number );
[Code]...
The field FLAG_L1 is the field FLAG with a Lag 1 (order by ID, partition by PRODUCT). I want to write the field FLAG_L1 in an update statement, how can I do this?
installing Oracle for a new Data-Center(still in planning).It will be an OLTP shop working 24/7, with 250 concurrent users.
1. Can it, in theory run with good performance on a quad processor(something like Intel Xeon Series 56XX) , with 32GB of memory? 2. What is the Oracle Database Edition required for this configuration? 3. What additional things should one take into account to plan the most cost-effective configuration?
In an OLTP environment what cursor_sharing setting is preferred?Though typically we retain the original setting for most of the parameters except memory settings etc. I have queries in the following context
No. I am not facing any issue as of now (I am not supporting any Live environment) But I want to know the desgn considerations
First of all in OLTP environment (say one I am referring) we use pl/sql variables which are obviously bind variables Only in case where plan is expected to change we use hard coded values like 'CREDIT' or 'DEBIT' etc. for acc_type column
Again there can be 2 scenario 1) we use the same query for both acc_type values 2) we use 2 different queries IF v_parameter = 'CR' select * from accounts where acc_type='CREDIT'... else select * from accounts where acc_type='DEBIT'... end if;
Again suppose the values are skewed and we gather stats with histograms hereIs't it the setting 'cursor_sharing=similar' which will be useful in above case?as with this setting optimizer will 'think' which plan to pick depending upon the values and bind variable peeking is taken care in option 2 above with IF ELSE clause?
BTW I have carried several tests but not getting conclusive results For example I created following table with skewed data, created index and gather stats with histogram
SQL> select object_id,count(*) from skewed_data_tab group by object_id;
SQL> create index i_skewed_tab_data on skewed_data_tab(object_id);
SQL> exec dbms_stats.gather_table_stats(user,'SKEWED_DATA_TAB',cascade=>true, method_opt=>'for all columns size 254');
Then traced with following options 1) alter session set events '10046 trace name context forever, level 12';
SQL> begin for i_outer in(select n from ids order by tstamp) loop for i_inner in (select /* for exact */ object_id,object_name,object_type from skewed_data_tab where object_id=i_outer.n)
[code]...
2) set termout off alter session set events '10046 trace name context forever, level 12'; @/u04/scripts/exact.sql 5 cat /u04/scripts/exact.sql select /* for exact */ object_id,object_name,object_type from skewed_data_tab where object_id=&1;
HOW to use variable P_TMPLID in following statement
TYPE typ_unrecon IS TABLE OF REC_' || P_TMPLID ||'_UNRECON%ROWTYPE index by binary_integer;
because its throwing error while compiling
and also in statement FORALL i IN unrecondata.FIRST .. unrecondata.LAST SAVE EXCEPTIONS --STRSQL := ''; --STRSQL := ' INSERT INTO REC_' || P_TMPLID ||'_UNRECON VALUES ' || unrecondata(i); -- EXECUTE IMMEDIATE STRSQL; INSERT INTO REC_' || P_TMPLID ||'_UNRECON VALUES unrecondata(i);---throwing error on this statement commit; --dbms_output.put_line(unrecondata(2).TRANSID); EXCEPTION
PROCEDURE split_name ( full_name IN VARCHAR2, name1 OUT VARCHAR2, name2 OUT VARCHAR2, name3 OUT VARCHAR2, name4 OUT VARCHAR2, name5 OUT VARCHAR2 )
the above is the procedure declaration. i want to use this function in updating the records in a table. this procedure is working fine in forms and it is splitting the names perfectly and i dont know how to use this in update statement as it is not returning anything like functions do.
By using the RETURNING clause i am getting the new updated value. I need the old value for some processing. Do i have to explicitly query it before the update stmt? Pls reply.
I am having trouble figuring out why an update statment is ignoring the primary kiy index when performing an update through the application. The index IS used when the update is run from sql*plus or other sql tools.
The statement is very simple: update ITEM_MASTER set COST = :1 where SMARTPART_NUM = :2; ITEM_MASTER has unique, primary key index on SMARTPART_NUM
When I use OEM and other tools, I can see the index is not used in the exlain plan, and the query has a high CPU cost due to the full table scan. The table is analyzed, lately using 100%. Table rowcount is 229768
SELECT column_name, num_distinct, num_buckets, histogram, trunc(last_analyzed) ANALYZED FROM USER_TAB_COL_STATISTICS WHERE table_name = 'ITEM_MASTER' AND column_name = 'SMARTPART_NUM';
The database is Oracle Database 10g Release 10.2.0.4.0 - 64bit Production (on Windows, standard edition)
Here are parameters related to optimizer: optimizer_dynamic_sampling integer 2 optimizer_features_enable string 10.2.0.4 optimizer_index_caching integer 0 optimizer_index_cost_adj integer 100 optimizer_mode string ALL_ROWS optimizer_secure_view_merging boolean TRUE
We've tried rebuilding the indexes then re-analyzing, dropping stats and locking at zero, using various sample sizes; none have any impact.
We wondered if the bind variables are causing this, though in testing outside the application, we tried pl/sql and sql batches to mimic the passing of values into the binds, and all still used the index.
Other than putting a hint into SQL in the application (we'd have to ask for a customization), how can I "fix" the database to use the index? In other words, how can I make the database see that the cost of a FTS is much higher than using the index, whenever it sees these updates (either from sql or the application)? This is the simplest example, but we have 4-5 SQL updates on this and other tables that are ignoring the indexes and using full table scans, so we'd like to fix it for all.
Using Oracle 11gr2. If I call the following update statement from session A, session A will lock the row until a commit/rollback statement is issued from session A. If session B calls the same update statement and same row, session B will have to wait until the lock is released in session A. However, the application developers are speaking in terms of threads. Could it be possible that the update statement is called within the same session by multiple requests? If yes, could the case statement be evaluated without the row being locked which could lead to false results? Trying to keep this post brief. tableA has columnA (primary key, number) and columnB (number)
{update tableAset columnB = case when columnB = 3 then 4 when columnB = 4 then 5 else columnB endwhere columnA = 6;}
Could 2 requests (almost at the exact same time) in the same session evaluate columnB as 3. The desired result would be the first request sets the column to 4 and the second request sets the column to 5.
I have a table called test_renames that has two columns(new_name and old_name) and one row with the following values
NEW_NAME OLD_NAME DRUG10 DRUG1
I have another table called SH0 that has 10,000 rows and the column of interest is called ITEM1. ITEM 1 contains the following distinct drug names:
DRUG1,DRUG2,DRUG3,DRUG4,DRUG5
Each DRUG has multiple rows associated with it.
I need to only update rows for DRUG1 and set the name from DRUG1 to DRUG10 for all rows where ITEM1 is DRUG1.
However I need to write this update statement by joining with the values in the test_renames table that contains the NEW_NAME and the OLD_NAME.
DRUG1 has 2,000 rows associated with it. The following SQL statement gives me 2,000 rows
(SELECT NVL(CHG.NEW_NAME, SH.ITEM1) FROM test_renames CHG,sh0 sh WHERE UPPER(SH.ITEM1) = UPPER(CHG.OLD_NAME) AND UPPER(SH.ITEM1) IN (SELECT UPPER(OLD_NAME) from test_renames))
However when I run the following update statement, it appears that the SQL query updates all the 10,000 rows in the table instead of just touching the 2,000 rows for DRUG1. It does change all the rows for DRUG1 to DRUG10, but all the other ITEM1 values become null. What I need from the update statement is only chnage the rows for DRUG1 to DRUG10 and leave the other rows that I associated with DRUG2, DRUG3 etc. Here is my update statement.
UPDATE SH0 SH SET ITEM1 = (SELECT NVL(CHG.NEW_NAME, SH.ITEM1) FROM test_renames CHG WHERE UPPER(SH.ITEM1) = UPPER(CHG.OLD_NAME) AND UPPER(SH.ITEM1) IN (SELECT UPPER(OLD_NAME) from test_renames))
This update statement touches all 10,000 rows. I am looking to update only the relevant 2,000 rows for DRUG1.
I try to apply update statement on the button for the specific records, the command does executes if in the end i write execute_query it always asks for do u wanna save the records, yes or no. I want to remove that message. Also if i write commit it does remove that message but everytime i press the button it updates the old record fine but also adds one more entry for the same record.
I am issuing an update statement in which I am using multiple tables it is giving me an error " set keyword missing"
update E_CONT_DETAIL_NUMB_VALUE ecdnv, y_obj_category yoc, t_contact tc set ecdnv.ContTPRecCount = 1000 where tc.default_category_id = (select primary_key from y_ojb_category where tree_position = 'CONT') and ecdnv.detail_field_id=tc.default_category_id;
update E_CONT_DETAIL_NUMB_VALUE ecdnv, y_obj_category yoc, t_contact tc * ERROR at line 1: ORA-00971: missing SET keyword
I have to conditionally update a set of columns in a table. If the column status_code_stage_3 IS NULL THEN I have to update the column status_code_stage_2. The below query is giving error:-
Test Table create scripts CREATE TABLE test11( date_stage_3 date, reason_code_stage_3 varchar2(20), reason_code_stage_2 varchar2(20), opportunity_date date ) INSERT INTO test11 values(sysdate,'reason1',NULL,sysdate) INSERT INTO test11 values(sysdate,NULL,'reason2',sysdate)
[code]....
how to work out the update statement to use the conditional statement for columns.
After an Update statement, Sql%NotFound is being validated. Sql%NotFound validates to true even though a record matching the update condition is found. Because of this, the procedure execution Exits. If the Sql%NotFound is commented, then the Record gets updated. which is validating Sql%NotFound condition to True.
I have two tables have almost the same columns, how can I use merge statement to update the target table only when there is difference between source and target table. Is there any easier way not compare each column one by one? I am using Oracle 11.2
Here is the MERGE statement:
Merge into tb_trgt trgt using tb_src src on (src.id = trgt.id) when not matched then insert (trgt.id, trgt.nm, trgt.addr) values (src.id, src.nm, src.nm) when matched then update set trgt.nm = src.nm, trgt.addr = src.addr where trgt.nm <> src.nm or trgt.addr <> src.addr ;
Is there any easier way to specify the where clause in the NOT MATCHED? I don't want compare each column of the tables. Since I may have many columns in the tables.
I've seen this example numerous places, and tried to implement it, but I keep getting an "invalid identifier" error message, despite the fact that I've got the table and column specifically identified.For instance, my query reads like:
UPDATE tbl1 SET tbl1.EMPID = (SELECT tbl2.EMPIDA FROM tbl2 WHERE LOWER(tbl1.EMAILCOL) = LOWER(tbl2.EMAILCOL2) ) WHERE tbl2.EMPIDA IN ('Z1O435','S8M4722','M0D5156') AND EXISTS (SELECT tbl2.EMPIDA FROM tbl2 WHERE tbl1.EMAILCOL= tbl2.EMAILCOL2 );
But I'll keep getting flagged at the tbl2.EMPIDA column reference. I have not tried this in SQL Plus, just in TOAD, but it seems to repeatedly fail.I have had to dump records to standalone Access tables and link back to perform the updates.
I would like to insert a value if that value is not existing in the table (example for a column which contains date only new dates should be inserted and if the date already exists in the column then it needs to get updated )
example of scenario...
date s1 s2 s3
in the above if the date is new..it should get inserted with the appropriate slot no.(s1,s2,s3) if the date already exists it needs to update the no.in slot no.
