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Bulk Update in C#

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For inserting a huge amount of data in a database, I used to collect all the inserting information into a list and convert this list into a DataTable . I then insert that list to a database via SqlBulkCopy . Where I send my generated list LiMyList which contain information of all bulk data which I want to insert to database and pass it to my bulk insertion operation InsertData(LiMyList, "MyTable"); Where InsertData is public static void InsertData<T>(List<T> list,string TableName) { DataTable dt = new DataTable("MyTable"); clsBulkOperation blk = new clsBulkOperation(); dt = ConvertToDataTable

MySQL bulk INSERT or UPDATE

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问题 Is there any way of performing in bulk a query like INSERT OR UPDATE on the MySQL server? INSERT IGNORE ... won't work, because if the field already exists, it will simply ignore it and not insert anything. REPLACE ... won't work, because if the field already exists, it will first DELETE it and then INSERT it again, rather than updating it. INSERT ... ON DUPLICATE KEY UPDATE will work, but it can't be used in bulk. So I'd like to know if there's any command like INSERT ... ON DUPLICATE KEY

Sending mass email using PHP

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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 5000 subscribers are using Yahoo Mail, will Yahoo treat it as a DDOS attack and block the IP address of

Avoid being blocked by web mail companies for mass/bulk emailing? [closed]

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问题 Our company is sending out a lot of emails per day and planning to send even more in future. (thousands) Also there are mass mailouts as well in the ten thousands every now and then. Anybody has experience with hotmail, yahoo (web.de, gmx.net) and similar webmail companies blocking your emails because \"too many from the same source in a period of time\" have been sent to them? What can be done about it? Spreading email mailouts over a whole day/night? At what rate? (we are talking about

Faster bulk inserts in sqlite3?

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问题 I have a file of about 30000 lines of data that I want to load into a sqlite3 database. Is there a faster way than generating insert statements for each line of data? The data is space-delimited and maps directly to an sqlite3 table. Is there any sort of bulk insert method for adding volume data to a database? Has anyone devised some deviously wonderful way of doing this if it\'s not built in? I should preface this by asking, is there a C++ way to do it from the API? 回答1: You can also try

Bulk Update in C#

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问题 For inserting a huge amount of data in a database, I used to collect all the inserting information into a list and convert this list into a DataTable . I then insert that list to a database via SqlBulkCopy . Where I send my generated list LiMyList which contain information of all bulk data which I want to insert to database and pass it to my bulk insertion operation InsertData(LiMyList, \"MyTable\"); Where InsertData is public static void InsertData<T>(List<T> list,string TableName) {