WHERE clause is used to filter records, and extract only the specific data that we want in any special case.
Operators of WHERE Clause
Below are operators that could be used with where clause in SQL.
|< >||Not equal its is some time is used as !|
|>=||Greater than or equal|
|<=||Less than or equal|
|BETWEEN||Between a certain range|
|LIKE||Search for a pattern|
|IN||To specify multiple possible values for a column|
SELECT statement can be used to select single column from a database.
Let’s assume we have a table named as customers and this table having multiple columns like customer_name, customer_address, customer_contact_no. We want to select all the data of customer the above select statement will be utilized.
SELECT column1, column2....columnN FROM table_name WHERE condition;
Select all the customers who belongs to Pakistan.
SELECT * FROM Customers WHERE Country='pakistan';
Select a customer by ID.
SELECT * FROM Customers WHERE CustomerID=20;