How is the oracle select statement used?

The SELECT statement from Oracle is used to retrieve data from database tables. Its basic syntax is as follows:

SELECT column1, column2, ...
FROM table_name
WHERE condition;

The SELECT keyword is used to specify which columns to retrieve, which can be determined by column names, wildcards *, and so on; the FROM keyword is used to specify the table from which to retrieve data; and the WHERE keyword is used to specify conditions to filter data based on those conditions.

For example, to retrieve the names and salary information of all employees from a table named employees, you can use the following SELECT statement:

SELECT name, salary
FROM employees;

To add a condition, such as retrieving information only for employees with salary over 5000, you can use the following SELECT statement:

SELECT name, salary
FROM employees
WHERE salary > 5000;

In addition to the basic SELECT statement, Oracle also offers many other features such as aggregate functions, sorting, grouping, and joining, which can be used in the SELECT statement based on actual needs.