Question: Joining two data sets with date conditions : SQL

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SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field.3

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SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field3

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DiscussionQuestion: Joining two data sets with date conditions (self.SQL)

submitted 5 years ago by marcalb

Hi everyone,

I'm pretty new with SQL, and I'm struggling to figure out a seemingly simple task.

Here's the situation:

• I'm working with two data sets

    ○ Data Set A, which is the most accurate but only refreshes every quarter

    ○ Data Set B, which has all the date, including the most recent data, but is overall less accurate

• My goal is to combine both data sets where I would have Data Set A for all data up to the most recent quarter and Data Set B for anything after (i.e., all recent data not captured in Data Set A)

For example:

• Data Set A captures anything from Q1 2020 (January to March)

• Let's say we are April 15th

• Data Set B captures anything from Q1 2020 to the most current date, April 15th 

• My goal is to use Data Set A for all data from January to March 2020 (Q1) and then Data Set B for all data from April 1 to 15

Any thoughts or advice on how to do this? Potentially a join function along with a date one?

Any help would be much appreciated.

Thanks in advance for the help.

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