How To Detect Length Of String Inward Sql Server? Len() Component Example

One of the most mutual chore spell writing SQL queries or stored physical care for is to notice the length of String. Since most of the columns are VARCHAR, yous oft take away to notice the length earlier taking whatever action. In Java, yous tin notice the length of String yesteryear using the length() method only how nigh SQL Server? How volition yous notice the length of String inwards Microsoft SQL Server inwards full general in addition to Microsoft SQL Server 2016 inwards particular? Well, yous tin purpose the LEN() component to notice the length of a String value inwards SQL Server, for example, LEN(emp_name) volition hand yous the length of values stored inwards the column emp_name. This method exists from SQL Server 2008 onwards which agency yous tin purpose this component inwards SQL Server 2012, 2014, 2016 in addition to latest version of Microsoft SQL Server i.e. SQL Server 2017.


Btw, yous should retrieve that this is dissimilar than the length of the actual column which yous specify spell creating tabular array e.g. emp_name VARCHAR(60).

To hand yous an example, yous get got a column called emp_name VARCHAR(60), which agency the length of this column is 60 characters, it tin concur names alongside maximum threescore characters long, only non all names are threescore characters long, thus yous may take away to notice the length of actual String at times.

 In this SQL Server tutorial, I volition learn yous how to purpose the LEN() component to notice out actual length or publish of grapheme inwards a VARCHAR or CHAR field.

This component is besides explained inwards special inwards my favorite course of pedagogy Microsoft SQL for Beginners yesteryear Brewster Knowlton on Udemy, i of the best course of pedagogy to acquire SQL Server in addition to T-SQL from a beginners hollo for of view.

LEN() component Example inwards SQL Server 2014

If yous desire to notice out all names which are less than 10 characters than yous tin purpose LEN() component similar next SQL query:

SELECT emp_name from Employee where LEN(emp_name) < 10

This volition supply all employee whose cite is less than 10 character. LEN() is a really useful method, it takes column cite in addition to returns the length of values stored inwards that column.


Let's meet a duo of to a greater extent than instance of LEN() component inwards SQL Server 2008 in addition to 2014:

1) Write an SQL query to notice out all employees whose cite is greater than 10 characters only less than fifty character

SELECT cite from Employee where LEN(name) > 10 and LEN(name) < 50

You tin besides apply conditional logic using a CASE statement to exercise dissimilar things based upon dissimilar length e.g. yous tin shorten long cite yesteryear appending "..." at the halt of String.

SELECT CASE WHEN LEN (emp_name) <= 50  THEN emp_name ELSE LEFT(emp_name, 60) + '...' END As emp_name FROM Employee

So retrieve to use LEN() component inwards SQL Server to notice out the length of whatever String stored inwards VARCHAR column. It doesn't take away to endure VARCHAR, only LEN() component accepts a text value, which agency it could endure CHAR, VARCHAR, NCHAR or NVARCHAR every bit well.


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