SQL Server uses a cost-based query optimizer, which calculates the cost for multiple possible plans based on statistics it has on the columns being used and the potential indexes for each operation in the query plan. This information helps the optimizer determine the total cost for each plan. ...
With proper application and query design, SQL Server is capable of supporting many thousands of simultaneous users on a single server, with little blocking. Troubleshoot blocking Regardless of which blocking situation we are in, the methodology for troubleshooting locking is the same. These logical ...
Before optimizing query performance for Woodgrove Bank, you must understand how distributed queries are run in Azure Cosmos DB for PostgreSQL. You must also understand the server parameters you can use to tune query execution. Every cluster consists of a single coordinator node and mu...
Machine Learning Services (in database) Queries, stored procedures, views, functions, triggers (T-SQL) Replication, Change Tracking, Change Data Capture Startup, shutdown, restart issues (instance or database) SQL Server resource usage (CPU, Memory, Storage) and Configuration Slow query performan...
Know the Monitoring Tools and Resources Available in SQL Server 2008 Use T-SQL to View Database Information Manage SQL Server Services from the Command Line Use the Query Governor to Control Excessive Query Execution Ways to Find out What Data Was Deleted by SQL Server Repair Manage Access and...
Build on this common join between sys.dm_exec_requests and sys.dm_exec_sessions in the next query. Keep in mind to be returned by sys.dm_exec_requests, the query must be actively executing with SQL Server. Run this sample query to find the actively executing queries and their current ...
First, the process is placed into a synchronized state—that is, a known, predictable state of execution. This is important because it would be undesirable for the process to continue running while the debugger was attempting to interact with it in a potentially dangerous way, such as modifying...
Web Q&A: Storing SQL Data, URL Query Length, and More Data Points: Techniques for Managing Rowset Paging Cutting Edge: Form-based Programming in ASP.NET The XML Files: Web Services Encoding and More Advanced Basics: Windows Forms Controls House of Web Services: Mandatory Headers in ASP....
You can't benefit from new and improved features in subsequent versions of SQL Server if you bind a query to a specific execution plan. However, there are several query hints available on SQL Server, which are used for different purposes. Let's discuss a few of them below: ...
U-SQL is a SQL-like declarative query language that uses a data-flow paradigm and allows you to easily embed and scale out user-code written in .NET (for example C#), Python, and R. The user-extensions can implement simple expressions or user-defined functions, but can also provide the...