FORMAT Function for Transact-SQL – T-SQL

Returns a value formatted with the specified format and optional culture in SQL Server 2016. Use the FORMAT function for locale-aware formatting of date/time and number values as strings. FORMAT ( value, format ) Return Types:  nvarchar or null The length of the return value is determined by the format. Remarks:   FORMAT returns NULL for errors other than a culture that is not valid. For example, NULL is returned if the value specified in format is not…

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T/SQL Splint String/Text

One common task performed in database applications is given a full name, how can this be split into the first name and last name.  In this article, three different methods are discussed to perform this task using three different functions in SQL Server.  It is assumed in this article that the full name is just made up of one first name and one last name. Using SUBSTRING Function The first method is the use of the SUBSTRING string function,…

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T/SQL Generate Random Numbers

SQL Server has a built-in function that generates a random number, the RAND() mathematical function.  The RAND math function returns a random float value from 0 through 1.  It can take an optional seed parameter, which is an integer expression (tinyint, smallint or int) that gives the seed or start value. To use it, you can simply do a simple SELECT, as follows: SELECT RAND() AS The result generated by this SELECT statement is as follows (note that…

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T-SQL Comma Delimited Output

One of the common tasks performed when retrieving data from a SQL Server database is returning the result as a comma-delimited output instead of a result set.  This task can be performed by using a CURSOR selecting the column to be concatenated together.  Each row returned by the CURSOR is then concatenated together into a variable separating each one by a comma. Here’s how the script will look like using the table in the Northwind database. A sample…

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Built-in tools troubleshoot SQL Server memory usage

Dynamic management views Dynamic management views, first introduced with SQL Server 2005, provide information about server and database state. These views are useful for monitoring overall SQL Server health, identifying the root cause of SQL Server performance bottlenecks, and tuning SQL Server instance or database performance. The following is a list of dynamic management views available in SQL Server 20008R2, SQL Server 2012 and SQL Server 2014. You can use these views to obtain SQL Server memory usage information;…

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Tips for Effective SQL Server Database Maintenance

“ I have been asked several times for advice on how to effectively maintain a production database. Sometimes the questions come from none-DBAs who are implementing new solutions and want help fine-tuning maintenance practices to fit their new databases’ characteristics. As with the majority of tasks and procedures in the IT world, there isn’t an easy one-size-fits-all solution for effective database maintenance, but there are some key areas that nearly always need to be addressed. My top five areas of…

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T-SQL: RIGHT, LEFT, SUBSTRING and CHARINDEX Functions

This article explains the base functionality and uses of the LEFT, RIGHT, SUBSTRING and CHARINDEX functions in SQL. Samples script: Sample Results: Variable Data Results ——————– HELLO WORLD RIGHT Results ————- RLD LEFT Results ———— HEL CHARINDEX Results —————– 6 SUBSTRING Results —————– LO WO Combined Results ——————– HELLO  

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