bulkinsert

问题 I want to bulk insert about 700 records into the Android database on my next upgrade. What\'s the most efficient way to do this? From various posts, I know that if I use Insert statements, I should wrap them in a transaction. There\'s also a post about using your own database, but I need this data to go into my app\'s standard Android database. Note that this would only be done once per device. Some ideas: Put a bunch of SQL statements in a file, read them in a line at a time, and exec the

问题 I am doing a BULK INSERT into sqlserver and it is not inserting UTF-8 characters into database properly. The data file contains these characters, but the database rows contain garbage characters after bulk insert execution. My first suspect was the last line of the format file: 10.0 3 1 SQLCHAR 0 0 \"{|}\" 1 INSTANCEID \"\" 2 SQLCHAR 0 0 \"{|}\" 2 PROPERTYID \"\" 3 SQLCHAR 0 0 \"[|]\" 3 CONTENTTEXT \"SQL_Latin1_General_CP1_CI_AS\" But, after reading this official page it seems to me that this

问题 Is it possible to BULK INSERT (SQL Server) a CSV file in which the fields are only OCCASSIONALLY surrounded by quotes? Specifically, quotes only surround those fields that contain a \",\". In other words, I have data that looks like this (the first row contain headers): id, company, rep, employees 729216,INGRAM MICRO INC.,\"Stuart, Becky\",523 729235,\"GREAT PLAINS ENERGY, INC.\",\"Nelson, Beena\",114 721177,GEORGE WESTON BAKERIES INC,\"Hogan, Meg\",253 Because the quotes aren\'t consistent,

问题 Normally I can insert a row into a MySQL table and get the last_insert_id back. Now, though, I want to bulk insert many rows into the table and get back an array of IDs. Does anyone know how I can do this? There are some similar questions, but they are not exactly the same. I don\'t want to insert the new ID to any temporary table; I just want to get back the array of IDs. Can I retrieve the lastInsertId from a bulk insert? Mysql mulitple row insert-select statement with last_insert_id() 回答1:

问题 I\'m trying to import a correctly quoted CSV file, meaning data is only quoted if it contains a comma, e.g.: 41, Terminator, Black 42, \"Monsters, Inc.\", Blue I observe that the first row imports correctly, but the second row errors in a manner that suggests the quoted comma was treated as a field separator. I have seen suggestions such as this one SQL Bulk import from CSV to change the field terminator FIELDTERMINATOR=\'\",\"\' However, my CSV file only quotes fields that need it, so I do

问题 Below is my code that I\'d like some help with. I am having to run it over 1,300,000 rows meaning it takes up to 40 minutes to insert ~300,000 rows. I figure bulk insert is the route to go to speed it up? Or is it because I\'m iterating over the rows via for data in reader: portion? #Opens the prepped csv file with open (os.path.join(newpath,outfile), \'r\') as f: #hooks csv reader to file reader = csv.reader(f) #pulls out the columns (which match the SQL table) columns = next(reader) #trims

问题 I have a file (which has 10 million records) like below: line1 line2 line3 line4 ....... ...... 10 million lines So basically I want to insert 10 million records into the database. so I read the file and upload it to SQL Server. C# code System.IO.StreamReader file = new System.IO.StreamReader(@\"c:\\test.txt\"); while((line = file.ReadLine()) != null) { // insertion code goes here //DAL.ExecuteSql(\"insert into table1 values(\"+line+\")\"); } file.Close(); but insertion will take a long time.

问题 What is the best way to perform bulk inserts into an MS Access database from .NET? Using ADO.NET, it is taking way over an hour to write out a large dataset. Note that my original post, before I \"refactored\" it, had both the question and answer in the question part. I took Igor Turman\'s suggestion and re-wrote it in two parts - the question above and followed by my answer. 回答1: I found that using DAO in a specific manner is roughly 30 times faster than using ADO.NET. I am sharing the code

问题 I need to programmatically insert 10\'s of millions of records into a postgres database. Presently I am executing 1000\'s of insert statements in a single \"query\". Is there a better way to do this, some bulk insert statement I dont know about? 回答1: PostgreSQL has a guide on how to best populate a database initially, and they suggest using the COPY command for bulk loading rows. The guide has some other good tips on how to speed up the process, like removing indexes and foreign keys before

问题 I am testing Postgres insertion performance. I have a table with one column with number as its data type. There is an index on it as well. I filled the database up using this query: insert into aNumber (id) values (564),(43536),(34560) ... I inserted 4 million rows very quickly 10,000 at a time with the query above. After the database reached 6 million rows performance drastically declined to 1 Million rows every 15 min. Is there any trick to increase insertion performance? I need optimal