Split the Cypher cmd into two queries

Author: NataliaIvakina

modules/ROOT/pages/database-administration/standard-databases/create-databases.adoc

@@ -207,14 +207,18 @@ CREATE OR REPLACE DATABASE customers
 This is equivalent to running `DROP DATABASE customers IF EXISTS` followed by `CREATE DATABASE customers`.
 
 Keep in mind that using `CREATE OR REPLACE DATABASE` also removes indexes and constraints.
-To preserve them, run the following Cypher command before the `CREATE OR REPLACE DATABASE` and save the output:
+To preserve them, run the following Cypher commands before the `CREATE OR REPLACE DATABASE` and save their outputs:
 
 [source, cypher]
 ----
-SHOW INDEXES YIELD createStatement
-UNION
-SHOW CONSTRAINTS YIELD createStatement
-RETURN createStatement as statement
+SHOW CONSTRAINTS YIELD createStatement AS statement
+----
+
+[source, cypher]
+----
+SHOW INDEXES YIELD createStatement, owningConstraint
+WHERE owningConstraint IS NULL
+RETURN createStatement AS statement
 ----
 
 The behavior of `IF NOT EXISTS` and `OR REPLACE` apply to both standard and composite databases (e.g. a composite database may replace a standard database or another composite database).