How To Resolve/Fix PostgreSQL Default Value Not Working || PostgreSQL Co...

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-- In this video, we will

-- Use A Default Value

-- Default Value Not Working

-- Alter Column With A Default Value

-- Alter Column Datatype

-- So, keep watching and subscribe my channel

CREATE TABLE EMP(

ID NUMERIC,

NAME CHARACTER VARYING(20),

SALARY NUMERIC(10,2),

DEPTNO CHARACTER VARYING(10)

);

INSERT INTO EMP(id,name,salary,deptno)

values(1,'Akram',100.23,'10');

select * from emp;

-- Now, let's alter the table, and make Salary column default

Alter table emp alter column salary set default 50;

-- First I will show you when it works and then it won't work.

INSERT INTO EMP(id,name,deptno)

values(2,'Sohail','10');

-- This must have inserted salary as 50, which I have set default value.

-- Let's check

Select * from emp;

-- Now, I will show you when default value won't work

INSERT INTO EMP(id,name,salary,deptno)

values(3,'Knowledge 360',null,'15');

-- Here, the salary must be inserted as NULL

Select * from emp;

-- So, the conclusion is, whenever we give the default value, we do not

-- need to mention the column in the insert statement.

-- If we do so, then we have to put some value, even if it is null

-- The database will accept the null

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