SELECT Statement
The SELECT
statement is the most commonly used command in SQL for retrieving data from one or more tables. It allows you to specify which columns to return in the query result.
Example: Basic SELECT Query
SELECT Name, City FROM FreedomFighters;
Output:
Returns the Name
and City
of all records in the FreedomFighters
table.
Do's and Don'ts
Do's
- Specify only the columns you need to optimize query performance.
- Use meaningful aliases to make the result easier to understand.
Don'ts
- Don't use
SELECT *
unless you need all columns, as it may impact performance. - Don't forget to test and optimize queries for large datasets.