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Select Statement in SQL

The most commonly used SQL command is SELECT statement. It is used to query the database and retrieve selected data that follow the conditions we want.
Select Statement in SQL

In simple words, we can say that the select statement used to query or retrieve data from a table in the database.

Let's see the syntax of select statement.

SELECT expressions FROM tables WHERE conditions;

Here expression is the column that we want to retrieve.

Tables indicate the tables, we want to retrieve records from.

Optional Clauses

[WHERE Clause] : It specifies which rows to retrieve.

[GROUP BY Clause] : Groups rows that share a property so that the aggregate function can be applied to each group.

[HAVING Clause] : It selects among the groups defined by the GROUP BY clause.

[ORDER BY Clause] : It specifies an order in which to return the rows.

For example, let a database table: student_details;


SELECT first_name FROM student_details;

Note: the SQL commands are not case sensitive. We can also write the above SELECT statement as:

select first_name from student_details;

Now, you will get following data:


SELECT first_name, last_name FROM student_details;

Now, you will get following data:


We can also use clauses like WHERE, GROUP BY, HAVING, ORDER BY with SELECT statement.

SQL SELECT - javatpoint
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