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Question
Write the output of the queries (i) to (iv) based on the table, WORKER given below:
TABLE: WORKER
W_ID | F_NAME | L_NAME | CITY | STATE |
102 | SAHIL | KHAN | KANPUR | UTTAR PRADESH |
104 | SAMEER | PARIKH | ROOP NAGAR | PUNJAB |
105 | MARY | JONES | DELHI | DELHI |
106 | MAHIR | SHARMA | SONIPAT | HARYANA |
107 | ATHARVA | BHARDWAJ | DELHI | DELHI |
108 | VEDA | SHARMA | KANPUR | UTTAR PRADESH |
SELECT F_NAME, CITY FROM WORKER ORDER BY STATE DESC;
SELECT DISTINCT (CITY) FROM WORKER;
SELECT F_NAME, STATE FROM WORKER WHERE L_NAME LIKE '_HA%';
SELECT CITY, COUNT(*) FROM WORKER GROUP BY CITY;
Solution
F_Name City MARY DELHI ATHARVA DELHI MAHIR SONIPAT SAMEER ROOP NAGAR SAHIL KANPUR VEDA KANPUR - DISTINCT(CITY)
KANPUR
ROOP NAGAR
DELHI
SONIPAT
F_Name STATE SAHIL UTTAR PRADESH MAHIR HARYANA ATHARVA DELHI VEDA UTTAR PRADESH
CITY COUNT(*) KANPUR 2 DELHI 1 ROOP NAGAR 2 SONIPAT 1
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E_code
- StringE_name
- StringSal
- IntegerCity
- String
Note the following to establish connectivity between Python and MySQL:
- Username is
root
- Password is
root
- The table exists in a MySQL database named
emp
. - The details
(E_code,E_name,Sal,City)
are the attributes of the table.
Write the following statements to complete the code:
Statement 1 - to import the desired library.
Statement 2 - to execute the query that fetches records of the employees/coming from the city ‘Delhi’.
Statement 3 - to read the complete data of the query (rows whose city is Delhi) into the object named details, from the table employee in the database.
import ____________ as mysql #Statement 1
def display():
mydb=mysql.connect(host="localhost",user="root"
passwd="root", database=" emp")
mycursor=mydb.cursor()
____________ #Statement 2
details = ____________ # Statement 3
for i in details:
print (i)