Add basic ops query to check size of tables in Clickhouse

HelmChart/Docs/Clickhouse.md

@@ -13,4 +13,27 @@ then you should be able to access from the localhost and port 8123
 kubectl get secret/oneuptime-clickhouse -o go-template='{{(index .data "admin-password") | base64decode}}'
 ```
 
-Important: Please ignore % in the end of the password output. 
+Important: Please ignore % in the end of the password output. 
+
+
+### Basic Ops Queries
+ 
+
+#### Check Size of Tables in Clickhouse
+
+```sql
+SELECT
+    database,
+    table,
+    formatReadableSize(sum(data_compressed_bytes) AS size) AS compressed,
+    formatReadableSize(sum(data_uncompressed_bytes) AS usize) AS uncompressed,
+    round(usize / size, 2) AS compr_rate,
+    sum(rows) AS rows,
+    count() AS part_count
+FROM system.parts
+WHERE (active = 1) AND (database LIKE '%') AND (table LIKE '%')
+GROUP BY
+    database,
+    table
+ORDER BY size DESC;
+```