.show ingestion mapping

 .show table MyTable ingestion csv mapping "Mapping1"

.show table MyTable ingestion csv mappings .show table MyTable ingestion mappings .show database MyDatabase ingestion csv mappings

from: https://docs.microsoft.com/en-us/azure/data-explorer/kusto/management/show-ingestion-mapping-command

Use wildcard to search Kusto database

 find in (database('db_name_*').table_name_*_test) where isnotempty(['col1'])
| where time >= datetime(2021-05-05T00:00:00.00Z)
| where ['col1'] has "keyword"
| project ['col1']
| limit 500
| order by time desc