NW6 | Fathi Kahin | Module-DataBases | Big_Spender | week 2 #160
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fhkahin
changed the title
| @@ -48,7 +48,9 @@ You are working with Claire and Farnoosh, who are trying to complete a missing r | |||
| **You:** Absolutely. Here's the SQL query you need: | |||
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| ```sql | |||
| INSERT YOUR QUERY HERE | |||
| SELECT amount | |||
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Almost there! Requirement is to find out the transactions between 30,000 and 31,000, not just the amount. How will your select statement be amended to get the desired result?
| INSERT YOUR QUERY HERE | ||
| SELECT * | ||
| FROM spends | ||
| WHERE description LIKE '%fee%'; |
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Good approach and query is on the right track. However, based on the scenario question, "fee" might be inconsistently capitalised in the data. To avoid missing results, the WHERE clause should account for this. What postgresql operator allows for case insensitive matching? Compare your results
| SELECT sp.date, sp.description, expense.expense_area | ||
| FROM spends sp | ||
| JOIN expense_areas expense ON (sp.expense_area_id = expense.id) | ||
| WHERE expense.expense_area LIKE '%Better Hospital Food%'; |
| @@ -92,15 +99,19 @@ CREATE YOUR QUERY HERE | |||
| **You:** Sure thing. Here's the query for that: | |||
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| ```sql | |||
| INSERT YOUR QUERY HERE | |||
| SELECT to_char(date,'YYYY-MM') AS month, sum(amount) | |||
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Good job with the date formatting. well done
| ``` | ||
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| **Farnoosh:** Oh, how do I know who these suppliers are? There's only numbers here. | ||
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| **You:** Whoops! I gave you ids to key the totals, but let me give you names instead. | ||
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| ```sql | ||
| INSERT YOUR QUERY HERE | ||
| SELECT sp.amount, sup.supplier |
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The question is for the total amount spent by each supplier. Which operator missing here is needed to get the desired result?
| @@ -124,7 +138,8 @@ CREATE YOUR QUERY HERE | |||
| **You:** Sure thing. To confirm, the date is August 19, 2021, the transaction number is 38104091, the supplier invoice number is 3780119655, the supplier is 'Dell', the expense type is 'Hardware' and the expense area is 'IT'. Here's the query for that: | |||
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| ```sql | |||
| INSERT YOUR QUERIES HERE | |||
| INSERT INTO spends (expense_type_id, expense_area_id, supplier_id, date, transaction_no, supplier_inv_no, description, amount) | |||
| VALUES (7, 18, 16, '2021-08-19', 38104091, '3780119655', 'Computer Hardware Dell', 32000); | |||
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Good attempt here. The rows ' Dell', 'Hardware' and 'IT' are missing from other tables, what extra step is needed to have the rows populated where necessary? What effect will this change have on the 'id's inserted in spends table?
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