Final answer:
The AND logical operator combines search conditions that must be TRUE for a query's results to include a record. It narrows search results by including only records that fit all specified criteria, and is one of the three main Boolean operators.
Step-by-step explanation:
The AND logical operator is used to combine search conditions that must both be TRUE to include a row in the results of a query. When using AND in keyword searches, it narrows the results to include only those records where both (or all) of the specified conditions are met. For instance, entering a search query such as 'climate change AND renewable energy' in a search engine or database would return only the results that contain both terms climate change and renewable energy. This method of searching is efficient in excluding irrelevant information and focusing on the necessary data.
The other two Boolean operators, OR and NOT, function differently. OR broadens the search results by including any records that meet either or any of the conditions, while NOT helps to exclude records that contain certain terms. It's important to understand the functions of these operators to refine searches effectively and efficiently find relevant information or sources.