Updating table rows in php 4

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_type = src.object_type 9 , tgt.object_name = src.object_name 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 ); This simply means that a single target row might be updated multiple times, which could give rise to some data quality issues (for example, if compound arithmetic such as summing is included in the update of some columns).MERGE can be used with in PL/SQL (even row-by-row) but should generally be considered a set operation.In addition, we can achieve some minor gains by ordering the WHEN clauses in a MERGE according to which event is the most likely (i.e.most frequent first), although at our sample data volume, the effects of this are not generally noticeable.Without the outer join, Oracle would need to implement a "two-pass" solution such as we might code ourselves with a separate INSERT and UPDATE statement.

updating table rows in php 4-24updating table rows in php 4-49

We will revert to the key-preserved join and this time our MERGE should be successful.In versions prior to 9i, we would have to code this scenario either in separate bulk SQL statements or in PL/SQL.We will compare MERGE to these methods later in this article.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.

Leave a Reply

  1. Liesex chat 25-Nov-2017 14:43

    We also serve orthodox, adventist, Catholic singles and other Christian singles groups.

  2. Proxy dating sex sites 16-Oct-2017 01:08

    A one step Facebook log-in process leads on to a few simple questions (the most obvious – height, kids, whether you drink or smoke), a description and a photo – then you are in. To use the site fully – sending unlimited messages to other members – payment is required.

  3. 14 radiocarbon dating 19-Apr-2017 01:26

    I’ll let you in on something, my husband loves my massive tits and tight ass but he can barely last 4 minutes. I want horny mature housewife phone sex because I want large cocks that can fuck me hard and long.