adding missing error message

Author: Oxyjun

src/content/docs/d1/observability/debug-d1.mdx

@@ -75,6 +75,7 @@ Before retrying any failed operation:
 | `D1 DB is overloaded. Too many requests queued.`                            | The request queue to the D1 database is too long, either because there are too many requests, or the queued requests are taking too long.                                 | App action: Optimize the queries (so that each query takes less time), send fewer requests by spreading the load over time, or shard the queries. |
 | `D1 DB's isolate exceeded its memory limit and was reset.`                  | A query loaded too much into memory, causing the D1 database to crash.                                                                                                    | App action: Optimize the queries (so that each query takes less time), send fewer requests by spreading the load over time, or shard the queries. |
 | `D1 DB exceeded its CPU time limit and was reset.`                          | A query is taking up a lot of CPU time (e.g. scanning over 9 GB table, or attempting a large import/export).                                                              | App action: Split the query into smaller shards.                                                                                                  |
+| `No SQL statements detected.`                                               | The input query does not contain any SQL statements.                                                                                                                      | App action: Ensure the query contains at least one valid SQL statement.                                                                           |
 
 </Example>