Which two functions can be used together to filter records based on presence of a string within a column’s values?
- WHERE, SIMILAR TO
- WHERE, COLLECT
- WHERE, LIKE
- WHERE, CONCAT
Explanation: The correct answer is **WHERE, SIMILAR TO** because the **WHERE** clause is used to filter records based on specific conditions, and the **SIMILAR TO** function in SQL allows for pattern matching with more advanced regular expression-like syntax compared to **LIKE**. When combined, **WHERE, SIMILAR TO** can filter records based on the presence of a string or pattern within a column’s values, making it more flexible for complex string matching scenarios. This combination enables more precise filtering of records by allowing patterns to be specified in a more robust way. The **WHERE, LIKE** combination is also commonly used, but **SIMILAR TO** provides greater flexibility for pattern matching. The other options, **COLLECT** and **CONCAT**, do not serve the purpose of filtering based on string presence within a column.