How to Select a Certain Number of Characters from the Left or Right of a String in SQL Server

If you ever find yourself wanting only the first part of a string, or the last part of it, this article might help.

This article is specific to SQL Server, but the functionality is pretty common across most/all database management systems, not to mention most programming languages.

When working with SQL Server, you can use theT-SQL LEFT() and RIGHT() functions to return any given number of characters from the left or right of a string.

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How to Return a String in Reverse Order using SQL Server – REVERSE()

Starting from SQL Server 2008, the REVERSE() function can be used to reverse the order of a string. That is, it returns the characters in the string in reverse order.

Here’s the syntax:

REVERSE ( string_expression )

Where string_expression is an expression of a string or binary data type. It can be a constant, variable, or column of either character or binary data.

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3 Ways to Return a String of Multiple Spaces in SQL Server

When working with databases and the associated data, sometimes you need to insert a space when joining two strings together, or sometimes you need to replace a character with a space.

And then sometimes you need to insert multiple spaces. Here are 3 ways to return a string of multiple spaces in SQL Server using T-SQL.

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How to Remove Leading and Trailing Characters in SQL Server

In SQL Server, the TRIM() function is commonly used to remove leading and trailing whitespace from a string. But did you know that you can also remove other characters from the start/end of a string? It doesn’t have to be whitespace.

TRIM() is a T-SQL function that specifically removes the space character char(32) or other specified characters from the start or end of a string.

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How to Remove Leading Whitespace in SQL Server

Leading whitespace is a common issue when working with data. A leading whitespace is a space at the start of a string. In most cases, we don’t want any leading whitespace, and we will want to remove it before the data goes any further (whether that means being stored in the database, displayed to the user, or whatever).

Fortunately, SQL Server provides us with the LTRIM() function that allows us to remove leading blanks from a given string.

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2 Ways to Select Rows that Match all Items in a List (T-SQL)

This article presents two ways to select rows based on a list of IDs (or other values) in SQL Server. This can be useful in scenarios where you have a comma-separated list of IDs, and you want to query your database for rows that match those IDs.

Say you have the following list of IDs:

1,4,6,8

And so you now want to query a table for records that have any of those values (i.e. either 1, 4, 6 or 8) in its ID column.

Here are two ways to go about that.

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