SQL/T-SQL

@SQLServer

Identifying opened connections for the specific application in SQL Server

Connection listing queries in SQL Server
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Object relational mappers or ORMs are a great tool which can significantly reduce application development time, but if they are not use wisely they can cause bottlenecks and performance issues. Same goes for dependency injection containers. The lifetime of the components, especially the ones that can cause recurse locks like SQL Server connections must be as short as possible and they should be released as soon as work is done. ...read more

Reading JSON data in T-SQL on SQL Server

Extracting values from JSON string on SQL Server using T-SQL
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JSON is the most commonly used data fromat nowdays. It is lighter than XML, more readable and it's sindax complies with most OOP C-Like lnguages such as Java, JavaScript and C#. There is not really many downsides of using JSON, so that is one of the rasons everyone is using it in one way or another. ...read more

Create XML/HTML with T-SQL

Generating XML/HTML output in SQL Server
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Sending email from SQL is not a difficult to achieve, but generating rich HTML content might be. SQL Server itself is not built as a text processor, first approach would be to build HTML by simple concatenating the string elements. This approach will work, but over time it will become more and more difficult to maintain especially if you need to add layout elements over time. ...read more

IP address to octets split in TSQL

Split IP addresse into octets in SQL Server
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In case you need to handle IP addresses in SQL, they are not much useful as string values. To do anything with them rather then just storing and retrieving (checking the ranges for example) you need to split IP address to segments (octets). The following is modified method I run into online. ...read more

Reducing the number of Stored Procedures for the Application

Approach to reduce number of stored procedure for the application
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Nowadays, in the years of ORM, barely anyone thinks about stored procedures, but they are still there and accessing and reading data with ADO and SqlDataReader ist still the fastest way. Stored procedures are validated, parsed and compiled in SQL server, so these steps are not required to be performed versus plaint text query (which is what entity framework generates for accessing data). ...read more

Migrate stored procedures across databases

Copy stored procedure from one database to another with T-SQL
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When working on an app you create all your stored procedures, functions, tables, view and other objects in a development database (or t least it should be like that). A small but annoying problem occurs when you have to migrate your stored procedures to test or production database. Imagine during development you had let's say 20 stored procedures...read more

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