What is group by in sql?
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what is oracle sql,pl/sql with interfaces
How many sql are there?
How many types of relationship are there?
what are the different index configurations a table can have? : Sql dba
What does select top 1 do in sql?
How do you go back in sql?
What are the differences between in and exists clause?
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 self join and how it works??
what is 'force view'?
What program will open a mdb file?
Is primary key clustered index?