list of internet dating scams - Updating row using cursor oracle
I'm working on a query (a SELECT) and I need to insert the result of this one in a table. So I'm thinking using the same procedure to do my checks.
If we explain a MERGE statement, we can see the mechanism Oracle uses to determine whether source and target rows match.
The following output is an Autotrace explain plan for our original MERGE statement from above.
The sqlplus feedback gives us the breakdown of the previous merge rowcount.
UPDATE ( SELECT src.object_name AS src_name 2 , src.object_type AS src_type 3 , tgt.object_name AS tgt_name 4 , tgt.object_type AS tgt_type 5 FROM source_table src 6 , target_table tgt 7 WHERE src.object_id = tgt.object_id ) 8 SET tgt_name = src_name 9 , tgt_type = src_type; Run1 ran in 1239 hsecs Run2 ran in 522 hsecs Run1 ran in 237.36% of the time Name Run1 Run2 Diff STAT.buffers moved to hea 2 1,024 1,022 LATCH.simulator hash latch 5,423 7,820 2,397 LATCH.checkpoint queue latch 12,435 8,966 -3,469 STAT..session pga memory max 7,904 0 -7,904 STAT.entries 87,326 44,564 -42,762 allocation 87,793 44,871 -42,922 LATCH.cache buffers chains 580,501 499,486 -81,015 STAT.block changes 175,708 89,825 -85,883 STAT.block gets 132,934 46,622 -86,312 STAT..index fetch by key 0 86,889 86,889 STAT..table scan rows gotten 130,374 217,263 86,889 STAT..consistent gets - examin 230 87,120 86,890 STAT..buffer is not pinned cou 978 88,317 87,339 STAT.work - consistent rea 969 88,312 87,343 STAT..session logical reads 134,389 222,507 88,118 STAT..consistent gets 1,455 175,885 174,430 STAT.size 23,369,732 15,606,560 -7,763,172 Run1 latches total versus run2 -- difference and pct Run1 Run2 Diff Pct 693,976 568,252 -125,724 122.12% PL/SQL procedure successfully completed.
I tryied to call the procedure inside my SELECT but it does not works. The good news is, you can re-use all the investement in your stored procedures. In other words, if the salary is valid (according to the rules) it will be returned.
SQL can only use functions in the projection: it needs something which returns a value. Here is a procedure which enforces a completely just business rule: only managers can have a high salary. = 'MANAGER' then 8 raise x_sal; 9 end if; 10 exception 11 when x_sal then 12 raise_application_error(-20000, 'Only managers can earn that much! SQL Because it is a procedure we cannot use it in a SELECT statement; we need to wrap it in a function. Otherwise the function will re-hurl the stored procedure's exception.
This article introduces the new MERGE SQL command (sometimes referred to as "UPSERT").
MERGE is a DML command that enables us to optionally update or insert data into a target table, depending on whether matching records already exist.
We will pause the statistics between the two runs to reset the data. MERGE 2 INTO target_table tgt 3 USING source_table src 4 ON ( src.object_id = tgt.object_id ) 5 WHEN MATCHED 6 THEN 7 UPDATE 8 SET tgt.object_name = src.object_name 9 , tgt.object_type = src.object_type 10 WHEN NOT MATCHED 11 THEN 12 INSERT ( tgt.object_id 13 , tgt.object_name 14 , tgt.object_type ) 15 VALUES ( src.object_id 16 , src.object_name 17 , src.object_type ); We will now run a bulk update and insert as separate SQL statements.Tags: Adult Dating, affair dating, sex dating