Source data (text files)
A large amount of historical stock data has been downloaded in the text format:
The first line of each file contains shares.Code, Stock name, data type. The second row is the name of the data column:
Data Table
A
Reprinted from: Http://database.51cto.com/art/201108/282631.htmBULK insert how to efficiently import large amounts of data into SQL ServerIn this article we describe in detail how bulk insert can efficiently import large amounts of data into a SQL
Http://msdn2.microsoft.com/en-us/library/system.data.sqltypes.aspx
System. Data. sqltypes namespace
The
System. Data. sqltypes Namespace provides classes for native data types withhin SQL Server 2005. these classes provide a safer, faster
Readerwriterlock is used to synchronize access to resources. At any specific time, it allows multiple threads to simultaneously read or write data to a single thread. When resources do not change frequently, readerwriterlock provides a higher
Share an SQL function, which can control the display of the decimal places of the query results. If you need it, please refer to it.
Share an SQL function, which can control the display of the decimal places of the query results. If you need it,
There are a number of ways SQL Server data can be exported to Excel, such as DTS, SSIS, and call OPENROWSET with SQL statements. Here we develop ideas, use the CLR to generate Excel files, and consider some handy details.
Let me first demonstrate
ADO. NET can process data through DataSet or DataTable objects when disconnected from the database. It can connect to the data source again and update the data source only when data needs to be updated. A DataTable object is a table stored in the
Ado. Net can process data through dataset or datatable objects when disconnected from the database. It can connect to the data source again and update the data source only when data needs to be updated.
A datatable object is a table stored in
There are a number of ways SQL Server data can be exported to Excel, such as DTS, SSIS, and call OPENROWSET with SQL statements. Here we develop ideas, use the CLR to generate Excel files, and consider some handy details.
Let me first demonstrate
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