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Even the idea create a temporary table holding only primary key and Column b, and then apply cursor to it is slow. "c)if i have a composite key then"---where a.key1=b.key1 and a.key2=b.key2 and----)am i right for both insert/update by given ur advice? Another table summary of orders tt1 which is having current year summation and respective previous year summation columns. Type ------------------------------- -------- ------------ ORDER_NUMBER NUMBER(10) ORDER_DATE DATE CY_ORD_AMT NUMBER PY_ORD_AMT NUMBER Order date is current year date.I am think of the way without using cursor, script as below. I am getting current year data first into above table after I am trying to update previous year amount.I have another table B containg 10000 records of incremented and edited records of A table. I am using the following codes to append data from B to A.--For incremental/New data-----insert into Aselect * from B where column_name NOT IN(select column_name from B);--For Edited Data-------cursore C_ABselect * from Aminusselect * from AFor R in C_ABloop Update A set....where ..loop End; It's working but taking a huge time/sometimes hang the computer. to update 10,000 rows in a 100,000 row table should take seconds (it'll be a direct function of the number of indexes). The number of rows in both the tables is same after porting.Would u please help me how can i faster my procedure. But there is a posibility of one row inserted twice and another row may not be inserted at all.All fields in the temporary tables are varchar2) The actual Temp as well as Target table has 300 plus columns.2.) All rows failed during INSERT/u Pdate log them to a Fault table3.) Find out number of rows inserted verses update. The primary key columns of a should be mandatorily present in b, to ensure that only one row is updated. vnum_actual Value = 1000; After the distribution of the value 1000, the updated table should look like this: SNO ITEMCODE VALUE APPLIEDVALUE-------- -------- ---------- ------------ 1 item1 200 200 2 item2 100 100 3 item3 300 300 4 item4 200 200 5 item5 50 50 6 item6 200 150 7 item7 400 0 ( TOTAL:1000 ) Now, I can very well do this with a cursor. select * from t; SNO ITEMCODE VALUE APPLIEDVALUE ---------- -------- ---------- ------------ 1 item1 200 2 item2 100 3 item3 300 4 item4 200 5 item5 50 6 item6 200 7 item7 400 7 rows selected.I am using the PL/SQL to handle this, the Inserts are fine but the Updates are very slow. The test PL/SQL is as follows -declare todate date; current_mode char(10) :='load'; exec_code varchar2(200); exec_message varchar2(2000); this_total number :=0; this_succ number:=0; this_update number:=0; this_fail number:=0; this_insert number:=0; this_start char(10) ; this_end char(10); this_table_name varchar2(10) :='test'; cursor c is select * from test_temp ; commit_point number :=0; test_case number := null; fault_id varchar2(30);beginselect to_char(sysdate, 'hh24:mm:ss') into this_start from dual;delete from test_load_result where table_name =upper(trim(this_table_name));commit;for xc1 in c loopthis_total:=this_total 1; commit_point:=commit_point 1; if commit_point 10000 then commit; commit_point:=0; end if; declare begin test_case := xc1.test_jdate; insert /* append */ into test( test_id, test_code ,test_case ,test_month ,test_jdate , sequence_no , check_status ) values ( trim(xc1.test_id), trim(xc1.test_code), to_date( to_char(to_date('','mm-dd-yyyy') ,'j') abs(test_case),'j'), upper(to_char((to_date( to_char(to_date('','mm-dd-yyyy') ,'j') abs(test_case),'j')),'mon')), trim(xc1.test_jdate), trim(xc1.sequence_no), trim(xc1.check_status) ); this_succ:=this_succ 1; exception when others then if sqlcode = -1 then declare begin update test set check_status = trim(xc1.check_status) where test_id = trim(xc1.test_id) and test_code=trim(xc1.test_code) and test_jdate = trim(xc1.test_jdate) and sequence_no =trim(xc1.sequence_no) ; this_update := this_update 1; exception when others then exec_code := sqlcode; exec_message := sqlerrm; select sysdate into todate from dual; if (this_update 0) then this_update := this_update - 1; end if; this_fail:=this_fail 1; fault_id:= trim(xc1.rms_index); insert into test_fault select (select sysdate from dual), st.* from test_temp st where trim(rms_index)=trim(fault_id); insert into test_exception( exec_date, exec_mode, table_name,rms_index, exec_code, exec_message) values (todate,current_mode,this_table_name,fault_id,exec_code,exec_message); end; else exec_code := sqlcode; exec_message := sqlerrm; select sysdate into todate from dual; this_fail:=this_fail 1; fault_id:= trim(xc1.rms_index); insert into test_fault select (select sysdate from dual), st.* from test_temp st where trim(rms_index)=trim(fault_id); insert into test_exception( exec_date, exec_mode, table_name,rms_index, exec_code, exec_message) values (todate,current_mode,this_table_name,fault_id,exec_code,exec_message); end if;end;end loop; this_succ := this_succ this_update; select decode(sign(this_succ -(this_update this_fail)),1,this_succ -(this_update this_fail),0) into this_insert from dual; select to_char(sysdate, 'hh24:mi:ss') into this_end from dual; test_results(todate,this_start, this_end, this_table_name, this_total, this_succ,this_insert, this_update, this_fail);commit;end;/ November 08, 2002 - pm UTC you do realize that /* append */ hint is just a waste of keystrokes right? Is there any way to do this with a single update statement? [email protected] merge into t 2 using ( 3 select sno, itemcode, value, 4 greatest( least( value, :x -(sum(value) over (order by sno)-value)),0) new_appliedvalue 5 from t 6 ) X 7 on (= ) 8 when matched then update set appliedvalue = new_appliedvalue 9 when not matched then insert (sno) values (null) -- NEVER can happen 10 / 7 rows merged.

cursors pl sql updating-30

cursors pl sql updating-43

cursors pl sql updating-73

cursors pl sql updating-58

Additionally -- given the way the where and set clauses are CODED in the above -- it would succeed. For this I am using another table to find previous year dates for current year dates.The query would in fact execute without any error messages since the correlated subquery in SET clause returns EXACTLY one row for each row in B and the where clause executes without error. Lets say you have a table A ( id int, a1 varchar2(25) ) and a table B ( id int PRIMARY KEY, b1 varchar2(25) ). But I am not able to identify the correct record to update. Thanks January 02, 2004 - am UTC and i, not knowing how your data all fits together, cannot say would need an example (complete, yet concise, with sample data and an explanation of how the data all fits together) hi tom , desc child_table-------------------child_id number ;child_birth_date date;child_20_flag number(1) ; where the child_20_flag should indicate if the child reach 20 years old or , what is the best way to handle it automaticlly ?I put a primary key on B(id) because if there is NO SUCH constraint -- the update is totally ambigous -- if there is more then 1 value of B1 in B for a given ID -- we cannot tell what row in B should be used to update the row in A. dear sir , Acually my problem is huge that that simple , i just try to give u a sample of my problem.i just need to know the best way to update some column value that depends on other columns value in same table (or /and ) in other tables .specially when one of them is a date.i do made a script that run every day at 5 am. March 21, 2004 - pm UTC they are derived columns and should not be stored -- especially something like "20 years old flag" as that can change at any is, and will remain, my answer unless you give me a real world scenario that would demand otherwise (the 20 year old flag should NOT be stored, period) Hi I have three tables, A, B and CA is parent of B and C, A has a composite PK deptno and dname I would like to know if following delete SQLs are equivalent1.------------------------------------------delete bwhere(deptno, dept_name) in (select a.deptno, dname from a, c where a.deptno = c.deptno and a.dname = c.dept_name);2.-----------------------------------------delete bwheredeptno = (select a.deptno from a, c where a.deptno = c.deptno and dname = dpt_name)and dept_name = (select a.dname from a, c where a.deptno = c.deptno and a.dname = c.dpt_name); Are they :-?It isn't doing anything beyond confusing the reader of your code...do you believe the update is slow -- what led you to that particular conclusion. [email protected] select * from t; SNO ITEMCODE VALUE APPLIEDVALUE ---------- -------- ---------- ------------ 1 item1 200 200 2 item2 100 100 3 item3 300 300 4 item4 200 200 5 item5 50 50 6 item6 200 150 7 item7 400 0 7 rows selected.Hi Tom, I have a huge table similar to the following:eno ename dno sal mgr---------------------------------101 A 1 100102 B 1 200103 C 1 300104 D 2 100105 E 2 200---------------------------------Here I want to update the 'mgr' column with 'eno' value having largest 'sal' for each dno. what I want to do is update one column based on the values of 4 other columns like such:t1:recordno, begindatet2: recordno, date1, date2, date3, date4, I've tried to do the following update t1 set t1.begindate = (select greatest(greatest(st.date1, st.date2), greatest(st.date3, st.date4)) as greatest from t2 where t2.recordno = t1.recordno);it just freezes up on me...ideas?

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