How many types of keys are there in sql?
Create table emp (id number(9), name varchar2(20),salary number(9,2)); The table has 100 records after table created.Now i nee to change id's Datatype is to be Varchar2(15). now Alter table emp modify(id varchar2(15),name varchar2(20), salary number(9,2)); Whether it will work or returns error? post answer with explanation.
What is sqlerrd?
How do you delete data from a table?
What is function and procedure in pl sql?
How do you copy a table in sql?
How do I save the results of sql query in a file?
how to get the third quarter of employee details from emp?
What is diff between bulk collect and forall
What is the difference between join and natural join?
What are different categories of sql commands?
What are pl/sql cursors?
While inserting 10 rows using procedure, if 3rd entry is having some error, what will be the output? How u will handle that error?