bulk

问题 Can you help me to understand this phrase? Without the bulk bind, PL/SQL sends a SQL statement to the SQL engine for each record that is inserted, updated, or deleted leading to context switches that hurt performance. 回答1: Within Oracle, there is a SQL virtual machine (VM) and a PL/SQL VM. When you need to move from one VM to the other VM, you incur the cost of a context shift. Individually, those context shifts are relatively quick, but when you're doing row-by-row processing, they can add

问题 I am currently writing a music blog. The administrator posts a new article every 2-3 days. Once the administrator posts an article, a mass email will be sent to around 5000 subscribers immediately. What is the best way to implement the mass mail feature? Does the following function work? function massmail() { $content = '...'; foreach ($recipients as $r) { $_content = $content . '<img src="http://xxx/trackOpenRate.php?id='.$r.'">'; mail($r, 'subject', $_content); } } Another question: If all

问题 I am looking for help to import a .csv file into SQL Server using BULK INSERT and I have few basic questions. Issues: The CSV file data may have , (comma) in between (Ex: description), so how can I make import handling these data? If the client creates the CSV from Excel then the data that have comma are enclosed within "" (double quotes) [as the below example] so how do the import can handle this? How do we track if some rows have bad data, which import skips? (does import skips rows that

问题 What script, class or function you use to send many emails, excluding the in-built 'mail' function and excluding the PEAR Mail (many problems and compatibility issues in PHP 5.3). I want to send about 5000 emails per 'shot', but 'mail' function connect and disconnect for each email. PEAR Mail have many problems. I've tried Swiftmailer, but the HTML appears duplicated in many clients (because apparently it is attached). Is PHPMailer the answer? PS: Sorry for the typos. I'm Brazilian. 回答1:

问题 Based on a mapping file, i need to search for a string and if found append the replace string to the end of line. I'm traversing through the mapping file line by line and using the below perl one-liner, appending the strings. Issues: 1.Huge find & replace Entries: But the issues is the mapping file has huge number of entries (~7000 entries) and perl one-liners takes ~1 seconds for each entries which boils down to ~1 Hour to complete the entire replacement. 2.Not Simple Find and Replace: Its

问题 I tried [System.Reflection.Assembly]::LoadWithPartialName("Oracle.DataAccess") $bulkCopy = new-object Oracle.DataAccess.Client.OracleBulkCopy $oraClientConnString and got GAC Version Location --- ------- -------- True v2.0.50727 C:\Windows\assembly\GAC_32\Oracle.DataAccess\2.111.6.0__89b483f429c47342\Oracle.DataAccess.dll New-Object : Cannot find type [Oracle.DataAccess.Client.OracleBulkCopy]: make sure the assembly containing this type is loaded. At line:3 char:23 + $bulkCopy = new-object <<

问题 I'm trying to import .CSV files using BULK INSERT on SQL Server and a Format File. I have created the format file and set the correct field terminators for each value. The format file has been correctly validated and I have successfully imported some test data. However I have a problem when encountering comma's in the middle of quoted text, such as the following: "SB","7Y4386429Y0351805","B5503","","Chris",1,10,"Paypal","Hi sorry for the delay in payment, I will be sending payment soon."

问题 I was uploading the data to App Engine (not dev server) through loader class and remote api, and I hit the quota in the middle of a CSV file. Based on logs and progress sqllite db, how can I select remaining portion of data to be uploaded? Going through tens of records to determine which was and which was not transfered, is not appealing task, so I look for some way to limit the number of record I need to check. Here's relevant (IMO) log portion, how to interpret work item numbers? [DEBUG

问题 I am the admin of a several-years-old Facebook group that has since been overrun by scam accounts (700 or so of them). There are far too many members for me to, realistically, manually remove them - as Facebook recommends. Here is the link to the group: https://www.facebook.com/groups/101697209943412 I understand that many websites offer JavaScript to perform member removal in bulk; however, I also understand that most of these scripts are toxic and can give control of your page to their

问题 I have a folder full of WAV files with separate L and R channels. I've been using SOX for some things like changing the sample rate of the audio files inside a specific folder using this code: for file in *.wav; do sox $file -r 44100 -b 24 converted/$(basename $file) -V; done For example, I have these two files that I want to merge: - CLOSE_1_02.L.wav - CLOSE_1_02.R.wav I would like to merge them in a stereo file (L in the left channel and R in the right channel) with the name: "CLOSE_1_02