Data File Handling — Computer Science STD 12 Science — Question

Differentiate between PAN and LAN types of networks. 

Write SQL queries for (a) to (d) and find outputs for SQL queries (e) to (i), which are based on the tables.

TABLE: WATCHES

Watchid	Watch_name	Price	Type	Qty_store
W001	High time	10000	Unisex	100
W002	Life time	15000	Ladies	150
W003	Wave	20000	Gents	200
W004	High fashion	7000	Unisex	250
W005	Golden time	25000	Gents	100

TABLE: SALE

Watchid	Qty_Sold	Quarter
W001	10	1
W003	5	1
W002	20	2
W003	10	2
W001	15	3
W002	20	3
W005	10	3
W003	15	4

(a) To display all the details of those watches whose name ends with ‘time’

(b) To display watch’s name andprice of those watches which have price range between 5000-15000

(c) To display total quantity in store of unisex type watches

(d) To display watch name and their quantity sold in first quarter

(e) Select max(price),min(qty_store) from watches;

(f) Select quarter, sum(qty_sold) from sale group by quarter;

(g) Select watch_name,price,type from watches w, sale s where w.watchid=s.watchid;

(h) Select watch_name, qty_store, sum(qty_sold),qty_store

(i) W.watch=s.watchid group by s.watchid;

Explain the meaning of financial theft.

Write definition of a method OddSum(NUMBERS) to add those values in the list of NUMBERS, which are odd.

WAP to input a list of n number and count how many of the entered numbers were prime.

How to get the items of series A not present in series B?

How will you add a column to a pandas DataFrame?

WAF update_record_rool(n) to read the student number as parameter and update the record in student table.

Write a function search () to search a record in a binary file according to the employee number entered by the user. Also display the message “Record not found” in case record not found in the file.

Observe the table ‘Club’ given below:

Table: Club

Member_id	Member_Name	Address	Age	Fee
M001	Sumit	New Delhi	20	2000
M002	Nisha	Gurgaon	19	3500
M003	Niharika	New Delhi	21	2100
M004	Sachin	Faridabad	18	3500

(i) What is the cardinality and degree of the above given table?

(ii) If a new column contact_no has been added and three more members have joined the club then how these changes will affect the degree and cardinality of the above given table.