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How can you map NULL values to other values while display?
IF( ) , IFNULL( ) keywords are used to do so. They are 'LIMIT' is used for the following kinds of problems:
1) Answering questions about first or last and largest or smallest
2) Splitting a result set into sections so that you can method it one piece at a period.
Lock Based Protocol A lock is nothing but a mechanism that tells the DBMS whether a particular data item is being used by any transaction for read/write purpose. As there are t
Section A: Use the following tables to create a database called College. Use SQL commands. Student stuid(primary) lastName firstName
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
a) Distinguish between ‘database' and ‘Database Management Systems (DBMS)'. b) List and briefly describe five potential benefits of the database approach compared to conventio
State the data flow diagram of functional model Any action initiated by transition in the state diagram can be extended into an entire data flow diagram in functional model. Th
Question 1 Discuss about second normal form and third normal form Question 2 Write short note on 1) Data Manipulation Language 2) Data Definition La
Consider the entity type dependent related to employee entity, which is used to keep track of the dependents of every employee. The attributes of dependents are: name, sex, birth d
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
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