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Depending upon the rules we have found, we can classify the locks into two types.
Shared Lock: A transaction might be acquiring shared lock on a data item in order to read its content. The lock is shared in the sense that any other transaction can obtain the shared lock on that similar data item for reading purpose.
Exclusive Lock: A transaction might be acquiring exclusive lock on a data item in order to both read/write into it. The lock is excusive in the sense that no other transaction can acquire any type of lock (either shared or exclusive) on that similar data item.
write an SQL statement to create the database in MYSQL server
external and internal mapping with examples
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
For problems 1-4, give all candidate keys for the tables with FDs specified. Composite candidate keys must be put in parentheses, and candidate keys must be separated with commas
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
Define rotational latency time. The time spent waiting for the sector to be accessed to appear under the head is known as the rotational latency time.
ALTER TABLE Command : This command is used for variation of existing structure of the table in the given situation: When a new column is to be added to the table structure.
3. (10 points) Assume that you have been presented with the following relation for the Baxter Aviation database: Charters (Pilot#, Pilot name, Aircraft ID#, #seats, Village, Fligh
What is a dataset? A dataset is an in-memory database that is disconnected from any regular database, but has all the significant characteristics of a regular database. Dataset
Section A: Use the following tables to create a database called College. Use SQL commands. Student stuid(primary) lastName firstName
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