In SQL, the `AND`

and `OR`

operators are used to combine multiple conditions in a `WHERE`

clause to filter rows from a database table. They control the logical relationships between these conditions.

Here's an explanation of the differences between `AND`

and `OR`

operators:

AND Operator:

Logical AND: The

`AND`

operator is a logical operator that requires all specified conditions to be true for a row to be included in the result set. In other words, it creates a more restrictive filter.Example: If you use the

`AND`

operator to combine two conditions, Condition A and Condition B, the result will only include rows that satisfy both Condition A and Condition B.`SELECT * FROM table_name WHERE Condition_A AND Condition_B;`

The row must meet both Condition A and Condition B to be selected.

Truth Table: The result of the

`AND`

operator is true only when both of its operands are true. The truth table for`AND`

is as follows:`true AND true`

=> true`true AND false`

=> false`false AND true`

=> false`false AND false`

=> false

OR Operator:

Logical OR: The

`OR`

operator is a logical operator that requires at least one of the specified conditions to be true for a row to be included in the result set. In other words, it creates a less restrictive filter.Example: If you use the

`OR`

operator to combine two conditions, Condition A and Condition B, the result will include rows that satisfy either Condition A or Condition B or both.`SELECT * FROM table_name WHERE Condition_A OR Condition_B;`

The row can meet either Condition A or Condition B to be selected.

Truth Table: The result of the

`OR`

operator is true if at least one of its operands is true. The truth table for`OR`

is as follows:`true OR true`

=> true`true OR false`

=> true`false OR true`

=> true`false OR false`

=> false

Usage:

- Use
`AND`

when you want to create a more restrictive condition where all specified criteria must be met. - Use
`OR`

when you want a less restrictive condition and you're interested in rows that meet any of the specified criteria.

Here's an example to illustrate the difference:

```
SELECT *
FROM products
WHERE (category = 'Electronics' AND price > 100)
OR (category = 'Clothing' AND color = 'Red');
```

This SQL statement selects products that are either in the 'Electronics' category and have a price over 100 or are in the 'Clothing' category and are red in color, showing the use of both `AND`

and `OR`

operators together.

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