SQL SELECT Statement

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SQL SELECT Statement:

SQL SELECT statement is used to retrieve or recover data from one or more tables in a database. It’s one of the fundamental SQL commands, and it allows you to specify the data you want to retrieve and how you want it to be presented.

SQL SELECT Statement:

Here, we will explain the SQL SELECT statement with an example:

Syntax of SQL SELECT statement is as follows:

SELECT column1, column2, FROM table_name
WHERE condition;

Basics of SQL SELECT Statement

SELECT: SELECT keyword indicates that you want to retrieve or recover data.

column1, column2: These are the names of the columns you want to retrieve data from the table. You can specify one or more columns, separated by commas, or use * to select all columns.

FROM: This keyword specifies the table from which you want to retrieve data.

table_name: This is the name of the table where the data is stored.

WHERE (optional): This clause allows you to filter the data based on specific conditions. Rows that meet the specified condition will be included in the result.

Condition (optional): This is the condition that determines which rows are included in the result. It’s typically expressed using comparison operators like =, <, >, <=, >=, and logical operators like AND, OR, and NOT.

Example of a SQL SELECT statement:

Suppose we have a table called employees with the following data:

employee_id first_name last_name department
1 John Sharma Sales
2 Jane Verma HR
3 Alice Agarwal Marketing
4 Bob Purohit Sales

Now, if you want to retrieve the first names and the last names of all employees by SELECT in the ‘Sales’ department, you can use the SQL SELECT statement like below:

SELECT first_name, last_name FROM employees
WHERE department = ‘Sales’;

The result of this query would be:

first_name last_name
John Sharma
Bob Purohit

In the above SQL SELECT example:

We specified the columns first_name and last_name that we want to retrieve.

We specified the employees table from which we want to retrieve data.

We used the WHERE clause to filter the data based on the condition that the department must be equal to ‘Sales’.

So, the SQL SELECT statement retrieved the first names and last names of employees who work in the ‘Sales’ department.

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