Create 4-add-external-partition-data.sql

Author: uschwinn

data-platform/core-converged-db/hybrid-partitioned/scripts/4-add-external-partition-data.sql

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+REM Script: 4-add-external-partition-data.sql  
+REM Use EXCHANGE PARTITION 
+
+-- swap data segments to get external data partition
+ 
+ALTER TABLE hr.employees_hybrid
+EXCHANGE PARTITION(salary_4000) WITH TABLE ext_help;
+
+-- you can drop the external helper table EXT_HELP now