SQL Basics
SQL statement
SQL verbs
| VERB | Description |
|---|---|
SELECT | Retrieve data from a table |
INSERT | Adds data into a table |
DELETE | Remove data from a table |
UPDATE | Modify data in a table |
DROP | Delete a table |
UNION | Combine output from multiple queries |
WHERE | Filter records based on the conditions |
AND/OR/NOT | Filter records based on logical conditions |
ORDER BY | Sort records in ascending or descending order |
SQL Special Characters
| Special Character | Description |
|---|---|
' and " | String delimiters |
--, /*, # | Comment delimiters |
*, % | Wildcards |
; | End SQL statement |
=, +, <, >, () | Logical operations |