Developers deal with numerous data types on a day- to-day basis. We need to change the data type or format as per the user requirement. We use ‘SQL Server rounding function’ like SQL Round, Ceiling and Floor to round the values to the nearest numbers. We perform an arithmetic calculation on data as well. It is a challenging task to change the value of a number to an approximate number. We do not want to display decimal numbers in the application front end.
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This article explores SQL Count Distinct operator for eliminating the duplicate rows in the result set.
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In this article, we will review on EXEC SQL statement in SQL Server and explore a few examples.
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In this article, we will review SQL Server MERGE statement, alternatives to MERGE statement, different clauses and examples of MERGE statement in SQL Server.
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Just over a year ago, I published How to migrate SQL Server 2017 Master Data Services Models into another server article, that essentially demonstrated the migration of a SQL Server Master Data Services (MDS) model from one MDS instance to another. Like many of my previously published articles, I have since used the aforementioned article as a technical reference (i.e. syntax lookup for using MDSModelDeploy.exe utility) during the implementation of MDS-related projects for my clients.
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SQLSELECT statements are used to retrieve data from the database and also, they populate the result of the query into the result-sets. The SQL examples of this article discourse and explain the fundamental usage of the SELECT statement in the queries.
There are a variety of ways of managing data to insert into SQL Server. How we generate and insert data into tables can have a profound impact on performance and maintainability! This topic is often overlooked as a beginner’s consideration, but mistakes in how we grow objects can create massive headaches for future developers and administrators.
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A common task for newbies is to learn how to do a SQL convert date and work to convert them date to other data types or covert other data types to Date.
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This article is about basics of conventional SQL unit testing concepts and its implementation through tSQLt, a highly acclaimed SQL unit testing framework because of being written in T-SQL and its built-in design support for SQL SQL unit testing needs ranging from simple to complex scenarios.
Since we know that the SQL CTE (common table expression) offers us a tool to group and order data in SQL Server, we will see an applied example of using common table expressions to solve the business challenge of re-basing identifier columns. We can think of the business problem like the following: we have a table of foods that we sell with a unique identifier integer associated with the food. As we sell new foods, we insert the food in our list. After a few years, we observe that many of our queries involve the foods grouped alphabetically. However, our food list is just a list of foods that we add to as needed without any grouping. Rather than re-group or re-order through queries using a SQL CTE or subquery, we want to permanently update the identifier.
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In this article, we will discuss and learn basics and all details about SQL Server data type converting operations and also we will review the SQL CONVERT and TRY_CONVERT built-in functions with various samples. At first, we will explain and clarify syntax of the SQL CONVERT function and then we will learn how can we make data converting process numerical and date/time data types to character data.
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In this article, the latest in our series on Common table expressions, we’ll review CTE SQL Deletes including analyzing the operation before the delete, actually removing the data as well as organizing and ordering the deletes with CTEs.
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In CTEs in SQL Server; Querying Common Table Expressions the first article of this series, we looked at creating common table expressions for select statements to help us organize data. This can be useful in aggregates, partition-based selections from within data, or for calculations where ordering data within groups can help us. We also saw that we weren’t required to explicitly create a table an insert data, but we did have to ensure that we had names for each of the columns along with the names being unique. Now, we’ll use our select statements for inserts and updates.
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Common table expressions (CTEs) in SQL Server provide us with a tool that allows us to design and organize queries in ways that may allow faster development, troubleshooting, and improve performance. In the first part of this series, we’ll look at querying against these with a practice data set. From examples of wrapped query checks to organization of data to multiple structured queries, we’ll see how many options we have with this tool and where it may be useful when we query data.
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This article will provide an overview of SQL Server implicit conversion including data type precedence and conversion tables, implicit conversion examples and means to detect occurrences of implicit conversion
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From troubleshooting many data flow applications designed by others, I’ve seen a common pattern of over complexity with many designs. Putting aside possible risks by introducing too much complexity, troubleshooting these designs often involves opening many different applications – from a notepad file, to SSIS, to SQL Server Management Studio, to a script tool, etc. It may sound like many of these are doing a hundred steps, yet many times, they’re simply importing data from a file, or calling five stored procedures and then a file task of moving a file. This complexity is often unnecessary, as is opening many different tools when we can use a few tools and solve issues faster.
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CRUD operations are foundation operations every database developer and administrator needs to understand. Let’s take a look at how they work with this guide.
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This article will cover the STRING_SPLIT function in SQL Server including an overview and detailed usage examples.
One calculation that you are almost guaranteed to have to produce in your career as a T-SQL developer relates to the calculation of a turnaround time. This is often a key KPI for measuring the performance of both individuals and teams, particularly when the business operates within a service-oriented sector i.e. customer support, transportation, healthcare etc. Turnaround time calculation does not only refer to business metrics rather any activity (i.e. ordering a pizza) with a recorded start and an end time can have its own turnaround time calculated. In this article we evaluate different options for calculating a turnaround time including using DATEDIFF function, creating your own user-defined function (UDF) as well as an integration with SQL Server Master Data Services.
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In this article, I’ll show you how to find and replace data within strings. I will demonstrate how to use the function SQL REPLACE, where you look for a substring within a string, and then replace it.
A SQL index is used to retrieve data from a database very fast. Indexing a table or view is, without a doubt, one of the best ways to improve the performance of queries and applications.
A SQL index is a quick lookup table for finding records users need to search frequently. An index is small, fast, and optimized for quick lookups. It is very useful for connecting the relational tables and searching large tables.
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In this article, we’ll walk-though two other important SQL aggregate function, SQL COUNT and COUNT_BIG. In the previous article of this series, we covered how to retrieve data, join tables, work with dates and times, use window functions, filter data, and much more.
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In this article, we’ll walk-through the concept of the SQL Order by clause and understand how the SQL engine works with the ordering result in a query.
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This article is an effort to discuss SQL Cast and SQL Convert functions as a follow-up to previous articles, in which we’ve discussed several SQL tips such as SQL Date, SQL Coalesce, SQL Union, SQL Join, SQL Like, SQL String etc.
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