Development · Performance Tuning · Uncategorized

SQL Server Execution Plan formats

Execution plan helps in knowing how a query gets executed and troubleshooting a query which is performing poor. In SQL Server execution plan can be of 2 types: Estimated Execution plan Actual Execution plan Execution plan can be viewed in 3 different formats: Text format XML format Graphical format We can choose the format on… Continue reading SQL Server Execution Plan formats

Development

Limitation of In-Memory OLTP in SQL Server 2016 – Sp_rename not allowed

Hi friends, one more limitation of In-Memory OLTP is SQL Server 2016 is that sp_rename is not allowed to change the name of in-memory OLTP objects. Sp_rename is a system stored procedure which allows to change the name of the user-defined objects like table name, column name, datatype of a column etc. in the current… Continue reading Limitation of In-Memory OLTP in SQL Server 2016 – Sp_rename not allowed

Development

Getting started with In Memory OLTP in SQL Server 2016 – Part 1

In Memory OLTP (Hekaton) introduced in SQL Server 2014 is a new database engine component which is optimized for OLTP workloads to achieve the performance by storing data in memory and accessing data from memory. Memory optimized tables can be accessed using Transact –SQL. When memory optimized tables are accessed all data is stored into… Continue reading Getting started with In Memory OLTP in SQL Server 2016 – Part 1

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Limitation of In-Memory OLTP in SQL 2016 – Create Index is not supported

Hi friends, in this blog I will discuss another limitation of In Memory OLTP in SQL Server 2016. Once you create a table you cannot create any index created on memory optimized table using CREATE INDEX statement. So to create indexes you need to create them with column definition of memory optimized table. Let’s create… Continue reading Limitation of In-Memory OLTP in SQL 2016 – Create Index is not supported

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SQL Server – How to retrieve SQL plans from Cache

Hi friends, in this blog post I will tell you how we can retrieve the SQL plan from the cache. In SQL Server there are multiple DMV (Dynamic Management Views) and DMO (Dynamic Management Objects) which can be used to retrieve the information about execution plan. Sys.dm_exec_query_plan is most commonly used DMO which is used… Continue reading SQL Server – How to retrieve SQL plans from Cache

Development

SQL Server – String_Escape function in SQL Server 2016

Hi friends, in SQL server 2016 another string function that introduced is String_Escape. This function can escape special characters within texts and will return text with escaped characters. Syntax STRING_ESCAPE (expression, type) Currently only the value that is supported for type argument is ‘json’ only. If you try to specify another type it will result… Continue reading SQL Server – String_Escape function in SQL Server 2016