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Help understand SQL subquery
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3
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173
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January 18, 2021
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Accidentally dropped table, how to restore it?
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3
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18
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January 18, 2021
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Challenge: Each Country's Best Customer. Why the solution so complex when it can be easier?
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1
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20
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January 8, 2021
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Solution for 190-8 "Challenge: Each Country's Best Customer" seems overly complicated?
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14
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606
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December 30, 2020
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I ran the GROUP BY clause within the subquery and got near identical results yet slightly off and do not understand why
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1
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46
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December 9, 2020
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Code review please SQL - Building and Organizing Complex Queries
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0
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72
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November 28, 2020
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Even copy and pasting brings an error (SQL)
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4
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74
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November 27, 2020
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With regards to question 190-6, should it be rephrased for clarity?
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0
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46
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November 25, 2020
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I'm blinded to my error
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3
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65
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October 24, 2020
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Sql intersect not returning what I want
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2
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66
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October 17, 2020
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I can't test subqueries independently. Commenting the rest of the code doesn't work
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3
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74
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October 15, 2020
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Debugger not helpful in understanding why solution keeps crashing
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4
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61
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October 13, 2020
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Sql except operator not working properly
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6
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66
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October 11, 2020
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What does GROUP BY 1 do in the query?
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5
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100
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October 6, 2020
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Right answer not working?
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4
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79
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September 26, 2020
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I think I either spotted a mistake in your query or an opportunity for me to learn!
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8
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181
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September 22, 2020
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Why are results rounded to nearest second / is this a bug?
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4
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67
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September 19, 2020
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Best strategy to initially explore tables with SQL
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2
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148
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September 16, 2020
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Unnecessary additional GROUP BY in 190-3?
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5
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329
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September 10, 2020
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Is my easier answer adequate?
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2
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153
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September 9, 2020
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Why not include duplicates using UNION
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1
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75
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September 8, 2020
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190-8 | Why did the anser took a much longer/complex road
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6
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371
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September 7, 2020
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Why does this solution return fewer rows than requested?
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7
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96
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September 6, 2020
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How come SQL can use an alias twice?
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2
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112
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September 1, 2020
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Why Group By not Order By, and JOIN after SELECT?
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1
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67
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August 29, 2020
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Wrong answer with changing order of tables in JOIN
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2
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156
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August 27, 2020
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SQL - Querying rows from GROUP BY
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2
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96
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August 26, 2020
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SQL - Combining Rows Using Intersect and Except
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2
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92
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August 26, 2020
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SQL left join Building and Organizing Complex Queries 3/10
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7
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231
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July 24, 2020
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Order of tables in INNER JOIN - how important is this?
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1
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96
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July 17, 2020
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