Allows you to run SQL against the database. The SQL statement must return exactly one column and one row of data in the results. If one row is returned, it means that the lint has detected a problem. However, if no rows of data are returned, it means that there are no issues. Notice the use of `${table}` to indicate the name of the table the lint is running against.
Example configuration:

```yaml
- id: schemacrawler.tools.linter.LinterTableSql
  table-exclusion-pattern: .*BOOKS
  config:
    message: message for custom SQL lint
    sql: SELECT TOP 1 1 FROM ${table}
```
