Create README.md

Author: witold-swierzy

data-platform/autonomous-database/autonomous-json/oracle-api-for-mongodb-demos/NodeJS/hr/README.md

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+# oracle-json sample NodeJS scripts presenting different features of MongoDB API and Oracle JSON Database
+### 02_basic_demo.js 
+This script contains examples describin Oracle API for MongoDB support for basic native MongoDB statements, like insert, insertMany, update, and find
+### 03_expr.js
+This script contains an example of using $sql operator allowing for executing SQL statements against an Oracle API for MongoDB instance and how it can be used as a replacement for $expr native MongoDB operator
+### 04_mongo_views.js
+This script contains an example proving that MongoDB views are fully supported by Oracle API for MongoDB, including their creation using native MongoDB commands
+### 05_oracle_views.js
+This script contains examples of using Oracle JSON Collection Views and JSON Duality Views in queries expressed by using native MongoDB commands.
+examples cover creation, data loading (JSON Duality Views), querying as well as execution plans generation.
+### 06_partial_indexes.js
+This script contains example comparing native MongoDB partial indexes (not supported in exactly the same form by Oracle API for MongoDB) and Oracle function-based indexes, which can be used as a partial indexes replacements, but also offer full functionality of building indexing expressions, which are not limited to indexing only a part of the data.
+### 07_ps_indexes.js
+This script contains examples of using Oracle-specific Path-Subsetting indexes to increase the performance of MongoDB native commands. Examples cover creation such indexes by executing native MongoDB commands ($sql operator) as well as querying data and generating execution plans, which use such indexes
+### 08_mv_indexes.js
+This is the second script presenting another type of Oracle-specific indexes - Multivalue Indexes with examples of their creation and usage in MongoDB native queries, including displaying execution plans
+### 09_transactions.js
+This script presents full ACID transactions support provided by Oracle Database and Oracle API for MongoDB to MongoDB native applications: no limitations for size and time and availability even in case of a single-node/non-cluster/non-sharding architecture