SQL requires NOTE 2 to retrieve and sort data

Source: Internet
Author: User
1. to retrieve data using SELECT to retrieve table data, you must give at least two pieces of information to SELECT and where to SELECT. Use the DISTINCT keyword to retrieve different values. Example: SELECTDISTINCTvend_idFROMProducts;

1. to retrieve data using SELECT to retrieve table data, you must give at least two pieces of information to SELECT and where to SELECT. Use the DISTINCT keyword to retrieve different values. Example: select distinct vend_id FROM Products;

1. Retrieve Data

To use SELECT to retrieve table data, you must provide at least two pieces of information-What to SELECT and where to SELECT.

Retrieve different values

Use the DISTINCT keyword, website space, to retrieve different values, U.S. space. Example:

Select distinct vend_idFROM Products;, Hong Kong Virtual Host

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