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SQL | Query to select NAME from table using different options

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Let us consider the following table named “Geeks” :
G_ID FIRSTNAME LASTNAME DEPARTMENT
1 Mohan Arora DBA
2 Nisha Verma Admin
3 Vishal Gupta DBA
4 Amita Singh Writer
5 Vishal Diwan Admin
6 Vinod Diwan Review
7 Sheetal Kumar Review
8 Geeta Chauhan Admin
9 Mona Mishra Writer
SQL query to write “FIRSTNAME” from Geeks table using the alias name as NAME.
Select FIRSTNAME AS NAME 
from Geeks;
Output –
NAME
Mohan
Nisha
Vishal
Amita
Vishal
Vinod
Sheetal
Geeta
Mona
SQL query to write “FIRSTNAME” from Geeks table in upper case.
Select upper(FIRSTNAME) 
from Geeks;
Output –
(No column name)
MOHAN
NISHA
VISHAL
AMITA
VISHAL
VINOD
SHEETAL
GEETA
MONA
SQL query to find the first three characters of FIRSTNAME from Geeks table.
Select substring(FIRSTNAME, 1, 3) 
from Geeks;
Output –
(No column name)
Moh
Nis
Vis
Ami
Vis
Vin
She
Gee
Mon
SQL query to write the FIRSTNAME and LASTNAME from Geeks table into a single column COMPLETENAME with a space char should separate them.
Select CONCAT(FIRSTNAME, ' ', LASTNAME) AS 'COMPLETENAME' 
from Geeks;
Output –
COMPLETENAME
Mohan Arora
Nisha Verma
Vishal Gupta
Amita Singh
Vishal Diwan
Vinod Diwan
Sheetal Kumar
Geeta Chauhan
Mona Mishra
Write an SQL query to print all Worker details from the Geeks table order by FIRSTNAME Ascending.
Select * 
from Geeks 
order by FIRSTNAME asc;
Output –
G_ID FIRSTNAME LASTNAME DEPARTMENT
4 Amita Singh Writer
8 Geeta Chauan Admin
1 Mohan Arora DBA
9 Mona Mishra Writer
2 Nisha Verma Admin
7 Sheetal Kumar Review
6 Vinod Diwan Review
3 Vishal Gupta DBA
5 Vishal Diwan Admin

Last Updated : 19 Aug, 2020
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