is it mandatory to select all the column in a view then what
columns should be selected
Answers were Sorted based on User's Feedback
Answer / sundeep
no.view is nothing but virtual table.a view is like a instance variable for a query.if the query length is long and it used for more than twice then we go for views. In these views we will select the columns which are to be used in a table.
| Is This Answer Correct ? | 1 Yes | 0 No |
Explain the order of sql statement execution?
Can any one tell me how to increase the performance of a sql query ie what are the performance tips in creating or writing a sql query !!?
In pl/sql, what is bulk binding, and when/how would it help performance?
Sql technical questions
How do temporal tables work?
What is lexical units in pl sql?
Is primary key a clustered index?
What are the return values of functions SQLCODE and SQLERRM ?
what is definer rights invoke rights?
What are the different types of constraints?
Is join and inner join the same?
How to come back in normal stage in Mutating Table if mutating table is locked or update data?
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)