KdQu.png' alt='Microsoft.jet.oledb.4.0 Extended Properties Csv Delimited' title='Microsoft.jet.oledb.4.0 Extended Properties Csv Delimited' />High Performance Techniques for Importing CSV to SQL Server using Power. Shell. If youve ever tried to use Power. Shells Import CSV with large files, you know that it can exhaust all of your RAM. Previously, I created a script on Script. Center that used an alternative technique to import large CSV files, and even imported them into SQL Server at a rate of 1. Ive now gotten that number up to a massive 3. Importing into SQL Server. Two of the fastest ways to import data is to use bcp or Sql. Bulk. Copy. BCP is finicky, and requires a separate download. My intention is to create a script that can be used on any machine running Power. Shell v. 3 and above, so these scripts will be using Sql. Bulk. Copy. The catch is that Sql. Bulk. Copy. Write. To. Server requires a Datatable, Datarow, or IData. Reader as input. This means your plain text CSV data must be transformed into one of these objects prior to being passed to Write. To. Server. Ive tested three different methods for transforming CSV data to a consumable object. The first method uses Sql. Bulk. Copy, Stream. Reader and Data. Set batches. The second streams an Ole. Dbconnection query result set to Sql. Bulk. Copy. The third uses Sql. Bulk. Copy, Visual. Basic. File. IO. Text. Field. Parser and Data. Set batches. I actually tested logparser, too, but while logparser is amazing and way way faster for parsing files, it doesnt take advantage of sqlbulkcopy, so these approaches actually outperform logparser and my tests with SSIS for that matter. Setup. My lab is a VMWare virtualized lab which now consists of a Windows 1. GB RAM, and a SQL Server 2. Provider\u003dmicrosoft.jet.oledb.4.0 Extended Properties Csv' title='Provider\u003dmicrosoft.jet.oledb.4.0 Extended Properties Csv' />GB RAM 8 dedicated to SQL Server. Both are on on the same ESX host which sports a directly connected Samsung 8. EVO 5. 00. GB SSD drive. The databases recovery model is set to SIMPLE. The 1. 2 GB CSV in this example contains 1. This article describes how to import a CSV file with different data type columns into database with the help of schema. ASP. NETEXCEL ImportRownewsImportRow. A zip containing the CSV is available for download at geonames. First, I had to create the SQL table. CREATE TABLE all. Countries. Geo. Name. Id int PRIMARY KEY. Name nvarchar2. 00. Ascii. Name nvarchar2. Alternate. Names nvarcharmax. Latitude float. Longitude float. Feature. Class char1. Feature. Code varchar1. I have a CSV file that I want to get imported into an table i. ListObject. Normally Id do this with DataImport text file. OS windows xp sp2 Access Version 2003 ado tabtext tab Fields0. Read and Write CSV File in VB. NET We are using the FileIo namespace for writing CSV file and OLEDB Ado. CSV file. If youve ever tried to use PowerShells ImportCSV with large files, you know that it can exhaust all of your RAM. Previously, I created a script on ScriptCenter. Hello, I have a xls files and I will like to convert this file into csv format with delimiter without using objExcel CreateObject Excel. Application. Country. Code char2. Cc. 2 varchar2. Admin. 1Code varchar2. Admin. 2Code varchar8. Admin. 3Code varchar2. Admin. 4Code varchar2. Population bigint. Elevation varchar2. Timezone varchar4. Modification. Date smalldatetime. CREATETABLEall. Countries    Geo. Name. Idint. PRIMARYKEY,   Namenvarchar2. Ascii. Namenvarchar2. Alternate. Namesnvarcharmax,   Latitudefloat,   Longitudefloat,   Feature. Classchar1,   Feature. Codevarchar1. 0,   Country. Codechar2,   Cc. Admin. Codevarchar2. Admin. Codevarchar8. Admin. Codevarchar2. Admin. Codevarchar2. Populationbigint,   Elevationvarchar2. Demint,   Timezonevarchar4. Modification. Datesmalldatetime,Then I tested the various methods. Youll probably notice that these scripts dont have much error handling. I wanted to keep the code easy to read and straightforward. Finalized scripts with error handling and all that will be placed on Script. Center shortly. Stream. Reader to Data. Table batches. This one is by far the fastest, at up to 5. Realistically, youll probably be importing to an indexed table, which performs up to 4. Basically, the script performs the following. Creates the SQL Bulk Copy connection. Creates the Power. Shell datatable, along with its columns. Reads the CSV file using System. IO. Stream. Reader. Using readline, loads the CSV data row by row into the datatable. Performs the bulk import every x number of rows. Empties the datatable. Rinse repeat starting at step 4 until the end of the CSV file. In order to avoid having to specify column names each time you import a new CSV, the SQL table column order and CSV column order must be the same. If you need to rearrange your columns, I suggest creating a view and importing to the view. If youre wondering why batching was used, its because the datatable seems to get exponentially slower as it grows above a few hundred thousand rows. I actually wasnt able to import all 9 million rows into the datatable before my memory was exhausted. I tested various batch sizes, and 5. The downside to using this script is that it doesnt handle embedded delimiters well. So if you have a comma delimiter, and your data contains This Works,This, doesnt, then it will fail on This, doesnt. You can address this with a regex as seen below, after the code. The Script. Database variables. CSV variables. csvfile C tempallcountries. Row. Column. Names false. No need to modify anything below. Write Host Script started System. Diagnostics. Stopwatch Start. New. voidReflection. Assembly Load. With. Partial. NameSystem. Data. voidReflection. Assembly Load. With. Partial. NameSystem. Data. Sql. Client. Build the sqlbulkcopy connection, and set the timeout to infinite. Data Sourcesqlserver Integrated Securitytrue Initial Catalogdatabase. New Object Data. Sql. Client. Sql. Bulk. Copyconnectionstring, System. Data. Sql. Client. Sql. Bulk. Copy. Options Table. Lock. bulkcopy. Destination. Table. Name table. Timeout 0. bulkcopy. Create the datatable, and autogenerate the columns. New Object System. Data. Data. Table. Open the text file from disk. New Object System. IO. Stream. Readercsvfile. Get Content csvfile First 1. Splitcsvdelimiter. Row. Column. Names eq true null reader. Line. foreach column in columns. Columns. Add. Read in the data, line by line. Read. Line ne null. Rows. Addline. Splitcsvdelimiter. Write. To. Serverdatatable. Write Host i rows have been inserted in elapsed. Chefs Warehouse Atlanta. Elapsed. To. String. Clear. Add in all the remaining rows since the last clear. Rows. Count gt 0. Write. To. Serverdatatable. Clear. reader. Close reader. Dispose. bulkcopy. Close bulkcopy. Dispose. Dispose. Write Host Script complete. Write Host Total Elapsed Time elapsed. Elapsed. To. String. Sometimes the Garbage Collector takes too long to clear the huge datatable. System. GC Collect1. Database variablessqlserversqlserverdatabaselocationstableallcountries CSV variablescsvfileC tempallcountries. Row. Column. Namesfalse No need to modify anything below Write HostScript started. System. Diagnostics. Stopwatch Start. NewvoidReflection. Assembly Load. With. Partial. NameSystem. DatavoidReflection. Assembly Load. With. Partial. NameSystem. Data. Sql. Client 5. Build the sqlbulkcopy connection, and set the timeout to infiniteconnectionstringData Sourcesqlserver Integrated Securitytrue Initial Catalogdatabase bulkcopyNew Object. Data. Sql. Client. Sql. Bulk. Copyconnectionstring,System. Data. Sql. Client. Sql. Bulk. Copy. Options Table. Lockbulkcopy. Destination. Table. Nametablebulkcopy. Timeout0bulkcopy. Create the datatable, and autogenerate the columns. New Object. System. Data. Data. Table Open the text file from diskreaderNew Object. System. IO. Stream. ReadercsvfilecolumnsGet Contentcsvfile First. Splitcsvdelimiteriffirst. Row. Column. Names eqtruenullreader. Lineforeachcolumnincolumnsnulldatatable. Columns. Add Read in the data, line by linewhilelinereader. Read. Line nenull  nulldatatable. Rows. Addline. Splitcsvdelimiteri ifibatchsize eq.