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Question
is it possible to assign two primary key in a table
 Question Submitted By :: MySQL
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
A table can have only one primary key assigned. 
Is This Answer Correct ?    14 Yes 0 No
Sushma S
 
Answer
# 2
IF WE MAKE COMPOSITE PRIMIRAY KEY THEN ONLY MORE THAN ONE
COLUMNS WILL BE BIND UP.
 
Is This Answer Correct ?    11 Yes 1 No
Sudipta Santra
 
 
 
Answer
# 3
At the end of the day a primary key is unique non null value
that the data is indexed upon.

Even if only one column can be explicitly defined as the PK.
It is possible to uniquely identify a row differently, by
creating a unique non null column that is indexed. It is
implicitly then a PK.
 
Is This Answer Correct ?    3 Yes 0 No
Jd
 
Answer
# 4
Answer is strictly NO...!!!

we may have morethan one unique column in a table but we should assign only one primary key...!!
 
Is This Answer Correct ?    3 Yes 0 No
Vignesh Lakshmirajan
 
Answer
# 5
no it doesn't possible 
Is This Answer Correct ?    3 Yes 0 No
Guest
 
Answer
# 6
any if one time primary key in a table 
Is This Answer Correct ?    0 Yes 0 No
Rajan
 
Answer
# 7
yes 
Is This Answer Correct ?    1 Yes 2 No
Rajan Bajalia
 

 
 
 
Other MySQL Interview Questions
 
  Question Asked @ Answers
 
Explain advantages of MyISAM over InnoDB?   1
Difference between MYSQL_ASSOC,MYSQL_NUM and MYSQL_BOTH ? TCS 2
What are MySQL transactions?   2
What is the difference between SQL and SQL Server? Cognizent 3
how we can use more then one primary key in Single Table Systematix 9
how many table created when we create a table in mysql?   3
if we want to load data from a text file into a mysql table, but the columns in table are 1st: code(int) and 2nd: city(varchar), but in text file the format is 1st cityname and then code separeted by delimeters. how to load?   2
Give the syntax of REVOKE commands?   1
What is difference b/w composit key n primary key and forigion key?   4
Ondelete clause is specified with a.)Drop table b.)Delete command c.)Create table d.)Select command AMDOC 5
How many tables will create when we create table, what are they?   2
What?s the difference between query_cache_type 1 and 2?   1
 
For more MySQL Interview Questions Click Here 
 
 
 
 
 


   
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