SQL Server Statistics are an essential part of query performance in SQL Server. They help the query optimizer to prepare a query plan using the distribution of values in participating rows. If we do not have updated statistics, it might lead to resource intensive query execution plan. For example, for a large table having a billion records, SQL may choose to have an index scan instead of an index seek.
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DBATools is an open source PowerShell module with useful commands to do the administrative task in SQL Server. In my earlier articles on DBATools (see TOC at the bottom) we explored installation and performing database backups, restoration, and validation with DBATools.
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This article explores the useful function SQL IF statement in SQL Server.
This article explains the SQL Notebook feature in Azure Data Studio along with the Markdown language to customize it.
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This article explores SQL Server Concatenate operations using the SQL Plus (+) operator and SQL CONCAT function.
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This article on SQL Server Always On Listeners includes an overview and various connection configurations for specifying MultiSubnetFailover including SSMS, ODBC, ADO.NET, as well as MultiSubnetFailover limitations and how to connect to all IP addresses via RegisterAllProvidersIP.
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In a high OLTP environment, we may observe strain on CPU and IO due to frequent backups. It might include further complexity due to backup compressions. SQL Server Always On Availability groups provides the capability to perform database backups from the secondary replicas. This article explores Log backups in SQL Server Always On Availability Group.
This article explores the SQL ISNULL function to replace NULL values in expressions or table records with examples.
In my previous article Data Synchronization in SQL Server Always On Availability Group, we described a scenario where if a secondary replica goes down in synchronous data commit mode, SQL Server Always on Availability group changes to asynchronous data commit mode. It ensures that users can get their transaction commit irrespective of waiting for a secondary replica to come online.
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We use the SQL CHARINDEX function to find the position of a substring or expression in a given string. We might have a character in different positions of a string. SQL CHARINDEX returns the first position and ignores the rest of matching character positions in a string.
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The Python programming language is object oriented, easy to use and, widely used programming language. We can write simple Python SQL Scripts and it performs the task that is not easy to do with t-SQL.
This article explores the DATEADD SQL function and its usage scenarios with various examples.
This article describes the data synchronization process on SQL Server Always On Availability Groups in both Synchronous, and Asynchronous data commit mode.
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This article gives an overview of Orphan users and fixing them using DBATools PowerShell.
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In this article, we will review the new SQL TRIM function in SQL Server 2017 onwards as well as providing some information on strings functions that pre-date it like LTRIM AND RTRIM.
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This article explores the DATEPART SQL function and its use in writing t-SQL queries. In the previous article, SQL Convert Date Functions and Formats, we explored various data formats and convert them using SQL Convert function.
This article explains the SQL add column operation into an existing SQL table. We will also explore different examples of SQL add column operations.
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This article explains to the SQL Union and vs Union All operators in SQL Server. We will also explore the difference between these two operators along with various use cases.
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This article will provide a full overview, with examples of the SQL Outer join, including the full, right and left outer join as well as cover the union between SQL left and right outer joins.
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This article will fully cover the code snippet SQL developer productivity feature in Azure Data Studio including a list of available snippets and examples of how to create custom code snippets
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This article covers the SQL INSERT INTO SELECT statement along with its syntax, examples, and use cases.
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This article will cover the SQL PARTITION BY clause and, in particular, the difference with GROUP BY in a select statement. We will also explore various use cases of SQL PARTITION BY.
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This article will cover the SQL ORDER BY clause including syntax, usage scenarios to sort out results in a Select statement.
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In this article, we will explore database backup validation by with SQL restore database operations using DBATools.
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This article will cover the SQL SELECT INTO statement including syntax, parameters and use with multiple tables, filegroups and a WHERE condition
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