What Is Range Partitioning?
Partitioning is a great way to organize your data. It's like a big box that you can shove different information groups into and label them, so you know what goes where. Sometimes, the labels aren't enough. Sometimes, you need to be able to tell at a glance what group something belongs in, not just based on its title but also its contents. That's where range partitioning comes in! With range partitioning, you assign each partition a specific range for some field in the data. You can use this range to determine which division each data belongs in by comparing it against the contents assigned to each section. If it falls within the field, it goes into that partition; otherwise, it goes into another compartment where it fits you might have heard that range-partitioned tables are a thing, and you might wonder what they're all. Well, I'm here to tell you that range-partitioned tables are a thing you need. First things first, what is a range-partitioned table? A range-partitioned table is just like any other table except better. It's like the lovechild of a table and a spreadsheet. You can create indexes on columns, just like in an ordinary table, but you can also define ranges of values to be stored together in one or more partitions within the table. For example, let's say you have a table containing data about people's birthdays (represented by the date column). You could create a range partition based on the year. This way, all rows with birthday dates from 2015 would be put into one compartment, and all rows with birthday dates from 2016 would be put into another partition. If you wanted to find out how many people had birthdays in January 2015, all you'd have to do is query the section for January 2015! No more complicated joins or subqueries are required!
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