teach sql server

ansi SQL standard. SQL Server uses an extended set of ANSI SQL-92, called a T-SQL, which complies with the ANSI SQL-92 standards.The SQL language includes two main programming language

write cache exists and the algorithm is normal, RAID5 is even better than raid10, although there may not be much difference (here we should assume that there is a certain size of storage, enough write cache, and there is no bottleneck in the CPU for computing and verification ). This is because the raid check is completed in the cache. For example, for RAID 5 of four disks, you can calculate the check in the memory and write three data and one verification at the same time. Raid10 can only wr

Label:How to deploy Rstudio server on a Linux server, configure ODBC after you remotely access SQL Server through the RODBC package background: before writing an article that mentions the recent deployment of Rstudio server (building the analytics environment for the data An

Label:Introduction The transaction log in SQL Server is undoubtedly one of the most important parts of SQL Server. Because SQL Server uses transaction logs to ensure persistence (durability) and transaction rollback (Rollback). Th

Label:A small SQL Server DBA wants to talk about the capabilities of SQL ServerBaidu has not yet searched for relevant individuals to write more valuable articles, at least in the Chinese network of the world there is noBut there is an article on Microsoft's website: "Comparing SQL

server| distributed Tests on whether SQL Server 2000 and SQL Server 2005 distributed transactions work togetherMS DTC 1. MS DTC Background 2. The purpose of the MSDTC test 3. MSDTC test Environment 3.1 Verification test Environment: 3.2 Environment Configuration 3.3 Verifyin

Label:Originally using SQL Server 2000 databases, the DTS tool makes it easy to import and export data between SQL Server and DBF files, and now, after installing SQL Server2005, discovers the SQL

PremiseWhen this article discusses only SQL Server queries,For non-composite statistics, where the statistics for each field contain only the data distribution of theHow to estimate the number of rows based on statistical information when combining queries with multiple fields.The algorithm principle of estimating the number of data rows using statistics from different fields, and the differences between

Tags: User bar implicit conversion first location assignment set size getWhat is a cursor The result set, which is the collection of all row data returned after the select query. Cursors are a mechanism for working with result sets, which can locate a row in the result set, read or write multiple data, or move the cursor to navigate to the rows you want to manipulate the data. Generally complex stored procedures, there will be the appearance of cursors, his main use is: Navigates to a

Label:Original: SQL Server 2012:SQL Server architecture--The life cycle of a query (part 1th)To reduce the scope of the read operation, this article first looks at a simple select query and then introduces additional procedures related to performing the update operation. Finally, you will read that

Original: SQL Drip 38-sql Server 2008 and SQL Server R2 options for exporting data are slightly differentDescriptionpreviously, to export data from a table as a script, only with stored procedures. A new feature is now added in SQL