Database Management Systems Mcqs

Page No. 61

When SQL statements are embedded inside 3GL, we call such a program as


aNested query


bNested programming


cDistinct query


dEmbedded SQL


View Answer Embedded SQL

Which of the following SQL command can be used to modify existing data in a database table?


aMODIFY


bUPDATE


cCHANGE


dNEW


View Answer UPDATE

The SQL statement SELECT SUBSTR(‘123456789’, INSTR(‘abcabcabc’,’b’), 4) FROM EMP; prints


a6789


b2345


c1234


d456789


View Answer 2345

Which is the subset of SQL commands used to manipulate Oracle Database Structures, including tables?


aData Definition Language


bData Manipulation Language


cData Described Language


dData Retrieval Language



What are the different events in Triggers?


aDefine, Create


bDrop, Comment


cInsert, Update, Delete


dSelect, Commit



Which of the following is TRUE for the System Variable $date$?


aCan be assigned to a global variable


bCan be assigned to any field only during design time


cCan be assigned to any variable or field during run time


dCan be assigned to a local variable



Which character function can be used to return a specified portion of a character string?


aINSTR


bSUBSTRING


cSUBSTR


dPOS


View Answer SUBSTR

In SQL, which command is used to issue multiple CREATE TABLE, CREATE VIEW and GRANT statements in a single transaction?


aCREATE PACKAGE


bCREATE SCHEMA


cCREATE CLUSTER


dAll of the mentioned


View Answer CREATE SCHEMA

____ means that the data used during the execution of a transaction cannot be used by a second transaction until the first one is completed.


aConsistency


bAtomicity


cDurability


dIsolation


View Answer Isolation

The Oracle RDBMS uses the ____ statement to declare a new transaction start and its properties.


aBEGIN


bSET TRANSACTION


cBEGIN TRANSACTION


dCOMMIT


View Answer SET TRANSACTION

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