计算文本在 Redshift 中出现的次数

Question

Calculate the number of occurrences of the text, “university”, anywhere in the "School" field for each day in the 15 day period between 2018-12-15 to 2018-12-31?

Can someone help me with this query? I am working on a redshift environment.

Answer 1

You haven't supplied any information about the table, but the query would probably be similar to this:

SELECT
  date_field,
  COUNT(*) as qty
FROM table
WHERE
  school ILIKE '%university%' AND
  date_field BETWEEN '2018-12-15' AND '2018-12-31'
GROUP BY date_field
ORDER BY date_field

This counts the number of rows containing a case-insensitive university where a date field is between the indicated dates. This assumes that date_field is a DATE , not a TIMESTAMP .