define primary key & secondary key?
Answers were Sorted based on User's Feedback
Answer / anil kumar
Primary key is a field or combination of fields that can uniquely and minimally identifies a particular member of an entry.
A secondary key is a field or combination of fields that can be used to access or retrieve records.Secondary key values are not unique.
Is This Answer Correct ? | 15 Yes | 3 No |
Answer / chandrashekar
Secondary indices or secondary databases are used to access
a primary database by a key other than the primary key.
Recall that the Supplier Number field is the primary key of
the Supplier database. In this section, the Supplier City
field will be used as a secondary lookup key. Given a city
value, we would like to be able to find the Suppliers in
that city. Note that more than one Supplier may be in the
same city.
Both primary and secondary databases contain key-value
records. The key of an index record is the secondary key,
and its value is the key of the associated record in the
primary database. When lookups by secondary key are
performed, the associated record in the primary database is
transparently retrieved by its primary key and returned to
the caller.
Thaking You
Is This Answer Correct ? | 17 Yes | 39 No |
What is client side validation? Write a snippet.
Can you explain data-driven testing?
what is meant by keyboard driven test?
Can object repository be kept in version control and Database(DB) backed up daily ?
how to connect qtp to qc. what are the steps ?
Do you know what is the difference between "type" and "typeandwait" command?
has anyone attended mr. g c reddy sir classes? whom you guys want me to choose Mr. G C Reddy or Mr. Suresh Reddy ? Please help!!!!!!!!!!!
What is ‘good code’? What is ‘good design’?
What is ur goal when ur doing Performence Testing of an Web Application..?
Describe any bug you remember?
What is tsl?
i am living in pune.from 2 months i am searching s/w testing class.but i am confuse which is the good.please send me reply who complete their testing course..i want where teaching is very good & give real project.because many insti.assured placement & real time project,but after addmission it will not be true.so send me reply.i also confuse where i put my query.i hope so,will get reply soon