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About the SQL FAQ category
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0
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711
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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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23
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125633
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March 12, 2021
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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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22483
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July 30, 2021
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How do we search for patterns containing the actual characters "%" or "_"?
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12
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38807
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October 14, 2021
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When should I use INNER JOIN instead of LEFT JOIN?
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21
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46129
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December 25, 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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56192
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May 4, 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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39377
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November 7, 2021
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What are some ways that SQL is used in data science?
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7
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80193
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January 7, 2022
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Can we alias multiple columns in a single query?
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9
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48425
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May 19, 2021
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Does the order of tables in a JOIN matter?
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5
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27201
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August 3, 2021
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Can we apply DISTINCT to a SELECT query with multiple columns?
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11
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132664
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October 12, 2021
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What are some reasons to apply constraints to a table?
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12
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35367
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May 5, 2020
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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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30518
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December 7, 2019
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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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15882
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November 8, 2021
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Does COUNT() include duplicate values of a column?
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18
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44380
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January 27, 2022
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When storing missing data, should I store them as NULL?
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13
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34811
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September 29, 2021
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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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27029
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January 9, 2022
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How is ALTER different from UPDATE?
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11
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64281
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May 4, 2021
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What if we only want to delete a specific number of rows?
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28
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47144
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July 14, 2021
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When should we use each type of JOIN?
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1
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8458
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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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27399
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July 3, 2020
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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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7915
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November 22, 2018
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Can we apply ORDER BY with multiple columns?
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19
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32724
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October 14, 2021
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Is the `AND` used in `BETWEEN` the same as the `AND` operator between conditions?
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3
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24619
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January 18, 2021
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Can we apply the LIKE operator to values other than TEXT?
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14
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46577
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October 5, 2021
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When doing an INNER JOIN, are columns matched on NULL values?
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13
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19880
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August 4, 2021
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Are there guidelines to splitting a table as provided in the example?
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11
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16538
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August 2, 2021
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When using a CASE statement, do the values for THEN have to be a single type?
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19
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25161
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December 9, 2021
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Is it possible for a table to have more than one unique identifier column?
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15
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17325
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December 25, 2021
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Do SQL clauses always have to be entirely capitalized?
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10
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41384
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December 7, 2021
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