Category Archive: Batch processing


Fastest way of deleting all but 1 row in a table?

I came across a situation at work today that required me to delete most of the rows in a table. The table wasn’t very large, about 200 000 rows with an average row size of 90-100. Plus indexes. Let’s say it looked something like this: CREATE TABLE order_lines( order_no NUMBER(11) NOT NULL ,order_line_no NUMBER(5) NOT …

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