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sqlsql-serverinsertssmsdefault

How to set default value while insert null value into not null column SQL Server?

I have two tables t1 and t2. Both have id and name columns. The name column of t1 is defined as not null and it has the default value of 'Peter'.

I want to insert all the values from t2 into my t1 table. But I have some null values in t2 table. When I try to insert the values:

Insert into t1 
   select * 
   from t2;

It throws this error:

Msg 515, Level 16, State 2, Line 1
Cannot insert the value NULL into column 'Name', table 'T1'; column does not allow nulls.

Is there any possibilities to set the default value to the column when we try to insert the null value.

Solution

  • First Solution,

       insert into t1
    select id,isnull(name,'Peter') from t2

    Second solution

    ALTER TABLE T1 ALTER COLUMN name varchar(255) NULL

insert into t1
select id,name from t2

ALTER TABLE T1 ALTER COLUMN name varchar(255) NOT NULL