understanding default integrity constraint

Author: techysanoj

default_integrity_constraint.sql

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+use temp_db;
+
+show tables;
+
+
+-- this is basically used when there is no value provided for a column and we want to have some default value instead of null
+
+create table emp_new3(id int, exp int default 1);
+
+insert into emp_new3 values(1, 1); -- no error
+insert into emp_new3 values(NULL, NULL); -- no error
+
+insert into emp_new3(id) values(1); -- no error but the default value of exp is 1 not NULL.
+
+select * from emp_new3;