what is the difference between primary key and unique key?
Answers were Sorted based on User's Feedback
Answer / karishma39malik@gmail.com
primary key means... a key that is unique among all keys.. n
has no duplicate values and no repeated columns...
unique key is a key defined uniquely among all keys...
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / swi
1.IN ABAP Primary key is having null values where as in
unique key having no null values
Is This Answer Correct ? | 5 Yes | 4 No |
what are importance in problem tracking
Which tag is used to create the frame
How to connect to ms word wit VB ojective is to prepare s/w to generate question paper , selects questions randomly from the ms access , database
What are events in smartforms?
Diff.b/w Frames and container?
1 Answers Tech Mahindra, Wipro,
what you mean by mantis in IT interview? why we use mantis? advantage of mantis?
I am work in it aompenei
will it allow to add same value in HashMap class.
73. How can you set the status and title for a modal dialog box? a) In the attributes of the corresponding screen. b) Before the corresp. call screen statement. c) In a PBO module of the corresponding screen. d) In the PAI module of the corresponding screen.
write a program for finding the union of two integer array in java?
Why multiple inheritance is removed in java?
write the a cl program with the following specification A. Accept 2 parameters-date and date type B. if date type is J then convert date to *MDY format C. if date type is M convert date to *JUL format 4.send a program message with the value of converted date Please explain for each with coding?