Feature: Configure Data Type conversion (#12374)

Co-authored-by: Elitsa Marinovska <21998037+elit0451@users.noreply.github.com>
Co-authored-by: nikolajlauridsen <nikolajlauridsen@protonmail.ch>
Co-authored-by: Elitsa Marinovska <elm@umbraco.dk>
Co-authored-by: Niels Lyngsø <niels.lyngso@gmail.com>

src/Umbraco.Infrastructure/Persistence/NPocoSqlExtensions.cs

@@ -845,6 +845,21 @@ namespace Umbraco.Extensions
             return sql;
         }
 
+        /// <summary>
+        /// Creates a SELECT CASE WHEN EXISTS query, which returns 1 if the sub query returns any results, and 0 if not.
+        /// </summary>
+        /// <param name="sql">The original SQL.</param>
+        /// <param name="nestedSelect">The nested select to run the query against.</param>
+        /// <returns>The updated Sql statement.</returns>
+        public static Sql<ISqlContext> SelectAnyIfExists(this Sql<ISqlContext> sql, Sql<ISqlContext> nestedSelect)
+        {
+            sql.Append("SELECT CASE WHEN EXISTS (");
+            sql.Append(nestedSelect);
+            sql.Append(")");
+            sql.Append("THEN 1 ELSE 0 END");
+            return sql;
+        }
+
         /// <summary>
         /// Represents a Dto reference expression.
         /// </summary>
@@ -938,7 +953,6 @@ namespace Umbraco.Extensions
                 return this;
             }
         }
-
         /// <summary>
         /// Gets fields for a Dto.
         /// </summary>