oracle finding duplicate records
SELECT column_name, COUNT(column_name) FROM table_name GROUP BY column_name HAVING COUNT(column_name) > 1;
oracle finding duplicate records
SELECT column_name, COUNT(column_name) FROM table_name GROUP BY column_name HAVING COUNT(column_name) > 1;
oracle duplicate table
-- Copy a table (datas, columns and storage parameters) CREATE TABLE my_new_table AS SELECT * FROM my_source_table; -- Use NOLOGGING, and PARALLEL if allowed for faster copy CREATE TABLE my_new_table PARALLEL 10 NOLOGGING AS SELECT /*+ parallel(10) */ * FROM my_source_table; -- To create an empty table: CREATE TABLE my_new_table AS SELECT * FROM my_source_table WHERE rownum = 0;
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