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PT-02 How to read and understand Explain Query Plan in Postgresql Analytics Table

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About PT-02 How to read and understand Explain Query Plan in Postgresql

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To read an explained query plan in PostgreSQL, you can use the "EXPLAIN" command followed by the query you want to analyze. The output will show the execution plan that PostgreSQL uses to execute the query, including the sequence of operations it performs and the order in which it accesses tables and indexes. The most critical information in the explained plan is the "cost" or "estimated cost" of each operation, which gives an idea of how expensive that operation is in terms of CPU and I/O. It also provides some helpful information like number of rows width of rows type of join used number of filters number of sort operations number of index scans https://link.medium.com/4J7vJqZVZwb #postgresql #Explainplan #Queryplan

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