adding json convertion on mysql select statement

README.md

@@ -40,6 +40,7 @@ Repo to hold important notes, links and guides to help throughout the carrer
 1. [How to create table with case insensitive columns](/mysql/how_to_create_table_with_case_insensitive_columns.md)
 1. [How to insert blob](/mysql/how_to_insert_blob.md)
 1. [How to load CSV file into a table](/mysql/how_to_load_csv_file_into_table.md)
+1. [How to select columns as json](/mysql/how_to_select_columns_as_json.md)
 
 ## Powershell
 1. [Powershell commands](/powershell/powershell_commands.md)

mysql/how_to_select_columns_as_json.md

@@ -0,0 +1,31 @@
+# How to select columns as json
+
+Its possible to transform several columns into a json by using the following function.
+
+```sql
+SELECT 
+    id,
+    JSON_OBJECT (
+        "id", id,
+        "name", full_name,
+        "created_date", creationdate,
+        "details", JSON_OBJECT(
+                "address", address_column,
+                "country", country
+            )
+    ) as json_data
+FROM table_name;
+```
+
+Generated json:
+```json
+{
+    "id": 1,
+    "name": "full name of someone",
+    "created_date": "2022-01-31 00:00:00",
+    "details": {
+        "address": "the address of this someone",
+        "country": "country code"
+    }
+}
+```