Create README.md

Author: uschwinn

data-platform/core-converged-db/hybrid-partitioned/scripts/README.md

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+## Step by step instruction for the creation of hybrid partitioned tables
+
+This folder provides step by step instruction to create a hybrid partitioned table. the example uses table EMPLOYEES from schema HR.  
+
+- 1-create-partitioned-table.sql: create a partitioned table and add rows
+
+- 2-add-external-attribute.sql: Use ALTER TABLE command to add external partition attribute 
+
+- 3-create-external-data.sql: Create external helper table with ORACLE_DATAPUMP
+
+- 4-add-external-partition-data.sql: Use EXCHANGE PARTITION to provide data for the external partition
+
+- monitor-external-part-tables.sql: Use ALL_EXTERNAL_TAB_PARTITIONS
+
+- monitor-hybrid-tables.sql. Use ALL_TABLES with column hybrid