One table how may column and Primary key
Answers were Sorted based on User's Feedback
ONE COLUMN MAY HAVE N NUMBER OF COLUMNS,.. THERE IS NO RESTRICTION IN THAT.. BUT A TABLE SHOULD CONTAIN ONLY ONE PRIMARY KEY, BUT IT MAY HAVE N NUMBER OF UNIQUE KEYS.
| Is This Answer Correct ? | 12 Yes | 3 No |
Answer / shashi kishor prasad
In a Table there can have as many as 1024 colums but not
more than that is allowed. There can be only 1 primary key
in a table However you can combine multiple keys together to
act like a primary key that is called composite key.
Composite key is also a primary key, difference is that it
is a combination of no of colums that act as candidate key.
| Is This Answer Correct ? | 8 Yes | 1 No |
Answer / rehan khan
guys first plz check the question what is exactly asked ok
the numbers of column in a table can range from 1 to 254 and only one primary key in a table .
| Is This Answer Correct ? | 1 Yes | 0 No |
what is DTS what are tasks available
how do u do Performance tunning ?
1 Answers Infodat Technologies, Satyam,
What is difference between rownum and rowid?
What is store procedure? How do they work?
how to delete duplicate rows from table
is it possible to use a variable in a query with the IN clause (a,b,c..z), without getting quotes or conversion errors?
Why I am getting this error when renaming a database in ms sql server?
Data table as parameter in sql server?
What is difference between views and tables?
Does index speed up select statements?
Can you explain various data region available in ssrs with their use?
What is named query? : sql server analysis services, ssas
Oracle (3259)
SQL Server (4518)
MS Access (429)
MySQL (1402)
Postgre (483)
Sybase (267)
DB Architecture (141)
DB Administration (291)
DB Development (113)
SQL PLSQL (3330)
MongoDB (502)
IBM Informix (50)
Neo4j (82)
InfluxDB (0)
Apache CouchDB (44)
Firebird (5)
Database Management (1411)
Databases AllOther (288)