SQL - SELECT

The SELECT statement is used to select data from SQL database table. This is usually the very first command every SQL newbie learns and this is because the SELECT statement is one of the most used SQL commands.

Please have a look at the general SELECT syntax:

SELECT Column1, Column2, Column3, FROM Table1

The list of column names after the SELECT command determines which columns you want to be returned in your result set. If you want to select all columns from a database table, you can use the following SQL statement:

SELECT * FROM Table1

When the list of columns following the SELECT command is replaced with asterisk (*) all table columns are returned. Word of caution here, it’s always better to explicitly specify the columns in the SELECT list, as this will improve your query performance significantly.

The table name following the FROM keyword (in our case Table1) tells the SQL interpreter which table to use to retrieve the data.