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The SELECT statement is used to select data from a database. The statement retrieves the specified rows and columns from the database, filtered and sorted by any clauses that are included in the statement. The SELECT clause is always the first clause in a SELECT statement. It identifies the columns you want to include in the result set. These columns are retrieved from the base tables named in the FROM clause.
To retrieve all columns, use the wild card * (an asterisk) . For example, if you have a table called employees with columns id, name, age, and salary, you can retrieve all columns using the following SQL statement:
SELECT * FROM employees;
This will return all rows and all columns from the employees table.
The SELECT statement can also be used to retrieve specific columns by specifying their names separated by commas. For example:
SELECT name, age FROM employees;
This will return all rows with only the name and age columns from the employees table.
Here are some websites that discuss The Select Statement That Retrieves All The Columns From:
1. [Indiana University](https://kb.iu.edu/d/ahux)
2. [Volt Active Data Documentation](https://docs.voltdb.com/UsingVoltDB/sqlref_select.php)
4. [Microsoft Learn](https://learn.microsoft.com/en-us/sql/t-sql/queries/select-examples-transact-sql?view=sql-server-ver16)