doc: add sql

Author: FGRibreau

docs/enterprise.md

@@ -119,6 +119,13 @@ Here are some code examples in various programming languages that rely mainly on
     --8<--
     ```
 
+=== "SQL/Athena"
+    ```{.sql linenums="1"}
+    --8<--
+    ./enterprise/hmac_.sql
+    --8<--
+    ```
+
 !!! tip "Want more?"
     Don't see your favorite language here? [Just ask us :angel:](mailto:support@image-charts.com) !
 

docs/enterprise/hmac_.sql

@@ -0,0 +1,2 @@
+with query_string as (select * from (VALUES 'chd=t1:10,40,60,80,30,20|60,40,50,100,20,30&chs=999x600&cht=bvs&chxl=0:|Jan|Mar|Apr|May|Jun|Jul&chxt=x,y&chf=b0,lg,90,03a9f4,0,3f51b5,1&chm=D,03a9f4,1,0,5,1&icac=MY_ACCOUNT_ID') as t(qs))
+select concat('https://image-charts.com/chart?', qs, '&ichm=', lower(to_hex(hmac_sha256(to_utf8(qs), to_utf8('MY_SECRET_KEY'))))) from query_string;