The `SELECT` statement in SQL is used to retrieve data from one or more tables in a database. It allows users to specify the columns they want to retrieve and apply various conditions and operations to filter, sort, and manipulate the result set.
Basic Syntax:
SELECT column1, column2, ...
FROM table_name
WHERE condition
ORDER BY column1, column2, ...;
How to SELECT Types in SQL?
In SQL, you can use the `SELECT` statement to retrieve different types of data and perform various operations on them. Here are some examples:
1. Selecting All Columns:
SELECT * FROM table_name;
2. Selecting Specific Columns:
SELECT column1, column2
FROM table_name;
3. Selecting with a Condition:
SELECT column1, column2
FROM table_name
WHERE condition;
4. Using Aggregate Functions:
SELECT COUNT(*), AVG(column1), SUM(column2)
FROM table_name;