COBOL SQL Interview Questions

Are you a Database Administrator? Need to update DBA technical knowledge or need to prepare for a job interview? Check out this collection of COBOL SQL Interview Questions...

What RDMS objects are crested with the SQL CREATE statements?
What RDMS objects are required before you can create a table ?
In what RDMS object does one first list column names ?
What is the syntax for a CREATE TABLE statement ?
Can one add columns to a table after it has been defined?
Where in a table are added column located ?
After a table is defined, can columns be removed ?
Which RDMS objects can you change with the SQL ALTER statements?
What authority is required to create a table?
What is minimum authority required for one to create a tablespace?
When is it necessary to create a table index?
What is a synonym?
What is a foreign key?
What is referential integrity?
What are the column name qualifiers?
What is a correlation name?
What is a results table?
What is a cursor?
What is the basic differnce between a join and a union?
What is normalization and what are the five normal forms?
What are foreign keys?
Describe the elements of the SELECT query syntax?
Explain the use of the WHERE clause?
What techniques are used to retrieve data from more than one table in a single SQL statement?
What is a view? Why use it ?
Explain an outer join ?
What is a subselect? It is different from a nested select ?
What is the difference between group by and order by ?
What keyword does an SQL SELECT statement use for a string search?
What are some SQL aggregates and other built-in functions?
How is the SUBSTR keyword used in SQL?
Explain the EXPLAIN statement?
What is referential integrity?
What is a NULL value? What are the pros and cons of using NULLS ?
What is a synonym? How is it used
What is an alias and how does it differ from a synonym?
When can an insert of a new primary key value threaten referntial integrity?
What is the difference between static and dynamic SQL?
Compare a subselect to a join?
What is the difference between IN subselects and EXISTS subselect?
What is a Cartesian product?
What is a tuple?
What is the difference between static and dynamic SQL?
Any SQL implementation covers data types in couple of main categories. Which of the following are those data types?
We have a table with a CHARACTER data type field
What does the term "grant privileges" mean?
What is an image copy?
What is meant by an index?
What is an index key?
What is a join?
What is meant by locking?
What is meant by null?
What is an object?
Describe referential integrity?
Describe a primary key?
How would you find out the total number of row in a table?
How do you eliminate duplicate values in SELECT?
How do you select a row using indexes?
What are aggregate functions?
How do you find the maximum value in a column?
Can you use MAX on a CHAR column?
My SQL statement SELECT AVG(SALARY) FROM EMP-TABLE yields inaccurate results. why?
How do you retrieve the first 5 characters of FIRSTNAME column of EMP table?
How do you concatenate the FIRSTNAME and LASTNAME from EMP table to give a complete name?
What is the use of VALUE function?
What is UNION, UNION ALL?
Suppose I have five SQL SELECT statements connected by UNION/UNION ALL ...
What is the retriction on using UNION in embedded SQL?
In the WHERE clause what is BETWEEN and IN?
Is BETWEEN inclusive of the range values specified?
What are the wildcard characters ?
When do you use a LINK statement ?
What is the meaning of underscore ...
What do you accomplish by GROUP BY ... HAVING clause ?
Consider the employee table with column PROJECT nullable. How can you get a list of employees who are not assigned to any project ?
What is the result of this query if no rows are selected: SELECT SUM(SALARY) FROM EMP WHERE QUAL='MSC'; ?
Why SELECT * is not preferred in embedded SQL programs ?
What are correlated subqueries?
What is a cursor? Why should it be used ?
How would you retrieve row from a DB2 table in embedded SQL?
Apart from cursor, what other ways are available to you to retrieve a row from a table in embedded SQL?
How do you specify and use a cursor in a COBOL program?
What happens when you say OPEN CURSOR?
Is DECLARE CURSOR executable?
Can you have more than one cursor open at any one time in a program?
When you COMMIT, is the cursor closed?