DBMS WHERE clause ~ GNIITHELP

WHERE clause

Where clause is used to specify condition while retriving data from table. Where clause is used mostly with Select, Update and Delete query. If condititon specified by where clause is true then only the result from table is returned.

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Syntax for WHERE clause

SELECT column-name1, 
 column-name2, 
 column-name3, 
 column-nameN 
from table-name WHERE [condition];

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Example using WHERE clause

Consider a Student table,

s_id	s_Name	age	address
101	Adam	15	Noida
102	Alex	18	Delhi
103	Abhi	17	Rohtak
104	Ankit	22	Panipat

Now we will use a SELECT statement to display data of the table, based on a condition, which we will add to the SELECT query using WHERE clause.

SELECT s_id, 
 s_name, 
 age, 
 address 
from Student WHERE s_id=101; 

s_id	s_Name	age	address
101	Adam	15	Noida