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SQL Server’s ISNULL() equivalent in PostgreSQL

SQL Server provides an function ISNULL if the value placed in the 2nd parameter if the first parameter passed to the function ISNULL is null.

For example ,

SELECT ISNULL(Designation,’ ‘) from Employee

This will result in the displaying the empty string if the Designation is NULL.

SQL Server’s ISNULL() equivalent in PostgreSQL

The same can be achieved in PostgreSQL using the coalesce function

SELECT coalesce(Designation,' ') from Employee

Senthil Kumar B
Senthil Kumar is a former Microsoft MVP (Most Valuable Professional). He is a Co-Author of the book "Windows 10 Development Recipes using JavaScript and CSS" for Apress Publication. He is a technical presenter, blogger, mentor and a Geek.  Senthil is a regular speaker is various local user groups. He has presented at conferences like Great Indian Developer Summit (GIDS) & Microsoft DevCamps. You can reach out to him via his Twitter handle @isenthil.