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About the SQL FAQ category
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0
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835
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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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24
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144031
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May 26, 2022
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Can a WHERE clause be applied with a HAVING statement in the same query?
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8
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24103
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July 30, 2021
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When should I use INNER JOIN instead of LEFT JOIN?
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23
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50503
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June 18, 2022
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How do we search for patterns containing the actual characters "%" or "_"?
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12
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41471
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October 14, 2021
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What happens if tables we perform UNION on have duplicate rows?
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16
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45125
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November 7, 2021
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Can we add a column at a specific position to a table?
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16
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59952
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May 4, 2021
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Can we alias multiple columns in a single query?
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11
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53458
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May 29, 2022
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What are some ways that SQL is used in data science?
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8
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90968
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June 3, 2022
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Does the order of tables in a JOIN matter?
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9
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29214
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February 6, 2022
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Can we apply DISTINCT to a SELECT query with multiple columns?
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12
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153331
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March 31, 2022
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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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31851
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December 7, 2019
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Does COUNT() include duplicate values of a column?
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20
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48266
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April 29, 2022
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How can we get the average of unique values of a column?
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12
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29403
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January 9, 2022
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Can we use WITH for more than one nested query in SQL?
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15
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17167
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November 8, 2021
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What are some reasons to apply constraints to a table?
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12
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38115
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May 5, 2020
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How is ALTER different from UPDATE?
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12
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68757
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February 11, 2022
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When storing missing data, should I store them as NULL?
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13
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37087
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September 29, 2021
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Is the `AND` used in `BETWEEN` the same as the `AND` operator between conditions?
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5
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26201
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February 27, 2022
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When should we use each type of JOIN?
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1
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9130
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November 29, 2020
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When applying the BETWEEN operator on TEXT values, how are values compared?
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3
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29331
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July 3, 2020
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What if we only want to delete a specific number of rows?
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29
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50378
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February 6, 2022
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Can we apply ORDER BY with multiple columns?
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19
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35078
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October 14, 2021
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Can we see a database's schema without being given a diagram?
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0
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8285
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November 22, 2018
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Can we apply the LIKE operator to values other than TEXT?
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15
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49554
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March 23, 2022
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When using a CASE statement, do the values for THEN have to be a single type?
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20
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26915
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February 28, 2022
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Is it possible for a table to have more than one unique identifier column?
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16
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18920
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February 25, 2022
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Do SQL clauses always have to be entirely capitalized?
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11
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44606
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February 11, 2022
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Are there guidelines to splitting a table as provided in the example?
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12
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18258
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January 29, 2022
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When doing an INNER JOIN, are columns matched on NULL values?
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13
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22829
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August 4, 2021
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