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About the SQL FAQ category
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0
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1196
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December 30, 2017
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Is there a shorter way to insert multiple rows in a table?
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35
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201599
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June 11, 2024
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Can we alias multiple columns in a single query?
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18
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84484
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August 13, 2024
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How do we search for patterns containing the actual characters "%" or "_"?
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16
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59877
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April 14, 2024
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Can a WHERE clause be applied with a HAVING statement in the same query?
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13
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40696
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May 12, 2024
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What are some ways that SQL is used in data science?
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13
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165040
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June 10, 2024
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Can we add a column at a specific position to a table?
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22
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103857
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June 22, 2024
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When should I use INNER JOIN instead of LEFT JOIN?
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27
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75698
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August 21, 2023
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Can we apply DISTINCT to a SELECT query with multiple columns?
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14
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261893
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June 26, 2023
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What happens if tables we perform UNION on have duplicate rows?
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22
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74462
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August 21, 2023
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Does the order of tables in a JOIN matter?
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9
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43810
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February 6, 2022
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What are some reasons to apply constraints to a table?
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25
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55739
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November 11, 2024
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How is ALTER different from UPDATE?
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20
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102527
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April 23, 2024
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When should we use each type of JOIN?
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1
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12280
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November 29, 2020
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How can we get the average of unique values of a column?
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16
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44293
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July 31, 2023
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What's the difference between COUNT(1), COUNT(*), and COUNT(column_name)?
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9
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36587
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December 7, 2019
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When storing missing data, should I store them as NULL?
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16
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51752
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June 29, 2023
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Can we use WITH for more than one nested query in SQL?
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21
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34934
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August 21, 2023
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When using GROUP BY, do we always have to group by a selected column?
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19
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69736
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August 7, 2023
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Does COUNT() include duplicate values of a column?
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25
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70557
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July 25, 2023
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When doing an INNER JOIN, are columns matched on NULL values?
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17
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46729
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January 20, 2024
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Are there guidelines to splitting a table as provided in the example?
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17
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26284
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August 15, 2024
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Can we apply ORDER BY with multiple columns?
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21
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56402
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July 12, 2023
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Are all databases relational?
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6
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86916
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December 27, 2023
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Can we apply the LIKE operator to values other than TEXT?
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19
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75784
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October 28, 2023
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When applying the BETWEEN operator on TEXT values, how are values compared?
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6
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40374
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July 5, 2023
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What are some other useful things that SQL lets us do?
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18
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24100
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August 13, 2024
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What if we only want to delete a specific number of rows?
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31
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77464
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November 14, 2023
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When using a CASE statement, do the values for THEN have to be a single type?
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37
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42851
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July 25, 2023
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Is the `AND` used in `BETWEEN` the same as the `AND` operator between conditions?
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13
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35443
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July 7, 2023
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