# What is SQL AND?

SQL `AND` is an operator that is used to create a query with different parameters. An entry will only be considered if all the conditions in the query are met.

## What is SQL `AND` and what is it used for?

The operator SQL `AND` is used in the [Structured Query Language](https://www.ionos.com/digitalguide/server/know-how/what-is-sql/) to include or exclude certain results when querying information. It’s an important tool for performing searches based on specific criteria. It can be combined with [SQL OR](https://www.ionos.com/digitalguide/server/configuration/sql-or/) when conducting an SQL `WHERE` query. Both operators function according to Boolean algebra, where a response can only contain two logical values: true or false. Within this framework, `OR` allows for more results to be included. SQL `AND`, on the other hand, is more restrictive.

## What is the syntax for SQL `AND`?

SQL `AND` is used together with `WHERE` in a `SELECT` query. The syntax looks like this:

```sql
SELECT column1, column2, …
FROM name_of_table
WHERE condition1 AND condition2 AND condition3 AND …;
```

Using the [SQL command](https://www.ionos.com/digitalguide/server/configuration/sql-commands/) `SELECT`, choose the columns that should be considered in your query. You can specify a single column or multiple columns. The `FROM` clause specifies the table where data should be retrieved. After `WHERE`, you can list all the conditions that an entry must meet in order to be included in the results. The SQL operator `AND` only outputs entries in the results **if they meet all the conditions**. `OR` , on the other hand, outputs entries if they fulfill at least one of the conditions.

## SQL `AND` examples

It’s easier to understand how SQL `AND` works with an example. Let’s imagine a company that has branches in different countries. We’re going to create a table that contains an ID number for each branch, the city and the country where each branch is located, and the number of employees at each branch. We’re going to name the table “Branches”.

<table>
  <thead>
    <tr>
      <th><strong>ID</strong></th>
      <th><strong>City</strong></th>
      <th><strong>Country</strong></th>
      <th><strong>Staff</strong></th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>1</td>
      <td>London</td>
      <td>England</td>
      <td>26</td>
    </tr>
    <tr>
      <td>2</td>
      <td>Manchester</td>
      <td>England</td>
      <td>15</td>
    </tr>
    <tr>
      <td>3</td>
      <td>Frankfurt</td>
      <td>Germany</td>
      <td>21</td>
    </tr>
    <tr>
      <td>4</td>
      <td>Buenos Aires</td>
      <td>Argentina</td>
      <td>21</td>
    </tr>
    <tr>
      <td>5</td>
      <td>Tokyo</td>
      <td>Japan</td>
      <td>17</td>
    </tr>
  </tbody>
</table>

Now, we’re going to initiate a query using the `AND` operator. This will allow us to exclude certain entries from our search results. In the example below, we want to find branches located in England with more than 20 employees. Here’s what the SQL query looks like:

```sql
SELECT ID, City, Country, Staff
FROM Branches
WHERE Country = 'England' AND Staff > 20;
```

The result looks like this:

<table>
  <thead>
    <tr>
      <th>ID</th>
      <th>City</th>
      <th>Country</th>
      <th>Staff</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>1</td>
      <td>London</td>
      <td>England</td>
      <td>26</td>
    </tr>
  </tbody>
</table>

The Manchester branch was excluded from our results, because despite being located in England, it has fewer than 20 people on its staff. The branches in Frankfurt and Buenos Aires weren’t included in the list because they are not located in England. Since the branch in Tokyo didn’t match either of the criteria, it was excluded as well.

## How to combine `AND` and `OR` operators in SQL

It’s also possible to combine the `AND` operator in SQL with `OR`. To show you how this works, we’ll use the table from the example above. Now we are going to search the entries in the Branches table to look for branch locations that have more than 20 employees and are located either in England or Argentina. In order to do this, we need to use parentheses. Here’s how to write the code for this query:

```sql
SELECT ID, City, Country, Staff
FROM Branches
WHERE (Country = 'Germany' OR Country = 'Argentina') AND Staff > 20;
```

And here’s the result:

<table>
  <thead>
    <tr>
      <th>ID</th>
      <th>City</th>
      <th>Country</th>
      <th>Staff</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>1</td>
      <td>London</td>
      <td>England</td>
      <td>26</td>
    </tr>
    <tr>
      <td>4</td>
      <td>Buenos Aires</td>
      <td>Argentina</td>
      <td>21</td>
    </tr>
  </tbody>
</table>

## Which operators are similar to SQL `AND`?

The SQL `AND` operator isn’t the only operator that can be used to filter data. In addition to the `OR` operator, there’s another operator you can use to search a dataset according to specific criteria. With the `NOT` operator, you can create conditions to filter entries based on criteria that they do **not** meet. For instance, you could use this operator to show all branches that aren’t located in England.

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This is a markdown version of: [https://www.ionos.com/digitalguide/server/configuration/sql-and-operator/](https://www.ionos.com/digitalguide/server/configuration/sql-and-operator/) for AI/LLM consumption.