Analyzing execution plans is made easier with curating execution plan, statistics of database objects such as tables, indexes, or columns involved in the actual runtime execution plan, all within a ...

Cardinality estimation is widely believed to be one of the most important causes of poor query plans. Prior studies evaluate the impact of cardinality estimation on plan quality on a set of ...

Huffman Engineering’s instrumentation and controls update at a city’s water treatment facility demonstrates the benefits of a deliberate process to establish clear communications ...

This not only clutters T-SQL code, but forces the execution plan to use an index scan. In SQL Server 2022, we have a new IS DISTINCT FROM and IS NOT DISTINCT FROM syntax that not only handles both ...

Technical documentation for Microsoft SQL Server, tools such as SQL Server Management Studio (SSMS) , SQL Server Data Tools (SSDT) etc. - MicrosoftDocs/sql-docs ...

The derived multi-engine plans are executed using the Spark distributed execution framework. Our detailed experimental evaluation, integrating PostgreSQL, MemSQL and SparkSQL under MuSQLE, ...

For this reason, SQL Server stores execution plans in a cache (called the plan cache), so that the stored execution plan is reused for subsequent executions of a given query.

Figure 1. Execution plan of a server query. As you can see in the above execution plan, SQL Server has highlighted a missing index that it thinks would help our query improve.