I\'m using Oracle 10g Express on Windows XP, and on a Macbook OS X 10.5.8 running PHP 5.3.1 with PDO and Oracle Instant Client 10.2.0.4.0_4, I run the following script:
I\'ve been hearing a lot lately that I ought to take a look at the execution plan of my SQL to make a judgment on how well it will perform.However, I\'m not really sure where to begin with this featur
Consider the following \"code\" define stmt1 = \'insert into T(a, b) values(1, 1); define stmt2 = \'select * from T\';
I have three tables: SmallTable (id int, flag1 bit, flag2 bit) JoinTable (SmallTableID int, BigTableID int)
When I run a mapreduce program using Hadoop, I get the following error. 10/01/18 10:52:48 INFO mapred.JobClient: Task Id : attempt_201001181020_0002_m_000014_0, Status : FAILED
I have executed a query and included the Actual Execution Plan.There is one Hash Match that is of interest to me because it\'s subtree uses a Index Scan instead of an index seek.When I mouse over this
I have this mysql query that I am trying to analyze. It is very slow, the visitor table here is about 50K entries, this query never returns. When I tried an explain statement, I found out that the ind
I am trying to speed up a long running query that I have (takes about 10 minutes to run...).In order to track down what part of the query is costing me the most time I included the Actual Execution Pl
What is the meaning of Select tables optimized away in MySQL Explain plan? explain select count(comment_count) from wp_posts;
I have a query that creates several temporary tables and then inserts data into them.From what I understand this is a potential cause of Table Spool.When I look at my execution plan the bulk of my pro
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