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List the types of authorization.
A) Read authorization
B) Write authorization
C) Update authorization
D) Drop authorization
define locking in simple language and decribed it
Order by clause By using this rows can be sorted It is used in the last portion of select statement By default it gets ascending order DESC: is used
usecase diagram,activity diagraM,SEQUENCE DIAGRAM
Data Fragmentation "Fragmentation includes decomposing the data in relation to non-overlapping component relations". Why do we require fragmenting a relation?
Identify the need and use of data control through problem solving, illustration
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
What are the differences among MySQL_fetch_array(), MySQL_fetch_object(), MySQL_fetch_row()? Mysql_fetch_object returns the result from the database like objects while mysql
Compare the Nested-loop join and block-nested loop join Ans: Nested loop join - It is costly as worst case cost, no. of block accesses needed is n r * b s + b r where b
sql is relationally complete-justify
List and also explain the dissimilar stages of DDLC ?
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