All Postings | Oracle Scratchpad | Just another Oracle weblog

All Postings | Oracle Scratchpad | Just another Oracle weblog

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日期:2025-04-30
That’s data that isn’t there until you look for it, sort of, from the optimizer’s perspective. Here’s some code to create a sample data set: create table t1 as with generator as ( select --+ materialize rownum id from dual connect by level...看更多