How To Uncovering Length Of String Inward Sql Server? Len() Purpose Example

One of the most mutual business patch writing SQL queries or stored physical care for is to respect the length of String. Since most of the columns are VARCHAR, yous oftentimes require to respect the length earlier taking whatsoever action. In Java, yous tin respect the length of String yesteryear using the length() method simply how close SQL Server? How volition yous respect the length of String inwards Microsoft SQL Server inwards full general as well as Microsoft SQL Server 2019 inwards particular? Well, yous tin purpose the LEN() component subdivision to respect the length of a String value inwards SQL Server, for example, LEN(emp_name) volition plow over 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 subdivision inwards SQL Server 2012, 2019, 2019 as well as latest version of Microsoft SQL Server i.e. SQL Server 2019.


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

To plow over yous an example, yous stimulate got a column called emp_name VARCHAR(60), which agency the length of this column is 60 characters, it tin concur names alongside maximum lx characters long, simply non all names are lx characters long, so yous may require to respect the length of actual String at times.

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

This component subdivision is too explained inwards exceptional inwards my favorite class Microsoft SQL for Beginners yesteryear Brewster Knowlton on Udemy, ane of the best class to acquire SQL Server as well as T-SQL from a beginners scream for of view.

LEN() component subdivision Example inwards SQL Server 2019

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

SELECT emp_name from Employee where LEN(emp_name) < 10

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


Let's come across a yoke of to a greater extent than event of LEN() component subdivision inwards SQL Server 2008 as well as 2019:

1) Write an SQL query to respect out all employees whose cite is greater than 10 characters simply less than l character

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

You tin too apply conditional logic using a CASE statement to practise 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 scream back to use LEN() component subdivision inwards SQL Server to respect out the length of whatsoever String stored inwards VARCHAR column. It doesn't require to move VARCHAR, simply LEN() component subdivision accepts a text value, which agency it could move CHAR, VARCHAR, NCHAR or NVARCHAR equally well.


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