NW6 | Sabella Fisseha | Module-DataBases | Big_Spender | week 2 #159
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| select * from spends where description ilike '%FeE%' |
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Good work taking capitalisations into consideration with 'ilike'. note you don't have to mix cases in the word, e.g '%FeE%' can simply be written as '%fee%'. ILIKE already handles the case insensitive matching
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| SELECT spends.*, expense_areas.expense_area | ||
| FROM spends | ||
| INNER JOIN expense_areas ON expense_areas.id = spends.expense_area_id |
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| **Claire:** Great, that's very helpful. How about the total amount spent for each month? | ||
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| **You:** You can get that by using the GROUP BY clause. Here's the query: | ||
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| ```sql | ||
| CREATE YOUR QUERY HERE | ||
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| SELECT DATE_TRUNC('month', date)::date AS month, SUM(amount) AS total |
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| SELECT SUM(spends.amount) AS total_amount | ||
| FROM spends | ||
| INNER JOIN suppliers ON suppliers.id = spends.supplier_id |
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Great job with the joins! However, two columns are expected in the results. What additional information from the suppliers table should be included in the SELECT statement?
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| SELECT date, SUM(amount) AS total_amount | ||
| FROM spends | ||
| WHERE date BETWEEN '2021-03-01' AND '2021-04-01' |
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Good attempt. Note that total amounts for only those two dates are required, and not every date inbetween. Which operator will allow for multiple distinct values to be specified in your WHERE statement?
| insert into expense_types (expense_type) values ('Hardware'); | ||
| select id from expense_areas where expense_area = 'IT'; | ||
| insert into expense_areas (expense_area) values ('IT'); | ||
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Great attention to detail! The 'Hardware', 'Dell', and 'IT' rows were missing from the other tables, and you've done well by adding the necessary insert statements to populate them.
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