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How to Connect Spark with PostgreSQL

After installing SparkR, Let’s try to import data from PostgreSQL,


How to Get the Row numbers of all tables in PostgreSQL Database

Recently, I imported 25 Excels into PostgreSQL separate tables with R, after imported, I was told there existed two excel files …

PostgreSQL:Get the Day Name of Week with One SQL

first show the sql,

dow means The day of week as Sunday (0) to Saturday (6), so you just need now …