|
About the SQL FAQ category
|
|
0
|
1199
|
December 30, 2017
|
|
Is there a shorter way to insert multiple rows in a table?
|
|
35
|
202253
|
June 11, 2024
|
|
Can we alias multiple columns in a single query?
|
|
18
|
84967
|
August 13, 2024
|
|
How do we search for patterns containing the actual characters "%" or "_"?
|
|
16
|
60214
|
April 14, 2024
|
|
Can a WHERE clause be applied with a HAVING statement in the same query?
|
|
13
|
41094
|
May 12, 2024
|
|
What are some ways that SQL is used in data science?
|
|
13
|
165093
|
June 10, 2024
|
|
Can we add a column at a specific position to a table?
|
|
22
|
106612
|
June 22, 2024
|
|
When should I use INNER JOIN instead of LEFT JOIN?
|
|
27
|
77510
|
August 21, 2023
|
|
Can we apply DISTINCT to a SELECT query with multiple columns?
|
|
14
|
266500
|
June 26, 2023
|
|
What happens if tables we perform UNION on have duplicate rows?
|
|
22
|
74753
|
August 21, 2023
|
|
Does the order of tables in a JOIN matter?
|
|
9
|
43998
|
February 6, 2022
|
|
What are some reasons to apply constraints to a table?
|
|
25
|
55765
|
November 11, 2024
|
|
How is ALTER different from UPDATE?
|
|
20
|
102551
|
April 23, 2024
|
|
When should we use each type of JOIN?
|
|
1
|
12287
|
November 29, 2020
|
|
How can we get the average of unique values of a column?
|
|
16
|
44498
|
July 31, 2023
|
|
What's the difference between COUNT(1), COUNT(*), and COUNT(column_name)?
|
|
9
|
36714
|
December 7, 2019
|
|
When storing missing data, should I store them as NULL?
|
|
16
|
51831
|
June 29, 2023
|
|
Can we use WITH for more than one nested query in SQL?
|
|
21
|
35976
|
August 21, 2023
|
|
When using GROUP BY, do we always have to group by a selected column?
|
|
19
|
71855
|
August 7, 2023
|
|
Does COUNT() include duplicate values of a column?
|
|
25
|
70887
|
July 25, 2023
|
|
When doing an INNER JOIN, are columns matched on NULL values?
|
|
17
|
47118
|
January 20, 2024
|
|
Are there guidelines to splitting a table as provided in the example?
|
|
17
|
26308
|
August 15, 2024
|
|
Can we apply ORDER BY with multiple columns?
|
|
21
|
56733
|
July 12, 2023
|
|
Are all databases relational?
|
|
6
|
86982
|
December 27, 2023
|
|
Can we apply the LIKE operator to values other than TEXT?
|
|
19
|
76281
|
October 28, 2023
|
|
When applying the BETWEEN operator on TEXT values, how are values compared?
|
|
6
|
40457
|
July 5, 2023
|
|
Can we see a database's schema without being given a diagram?
|
|
0
|
9859
|
November 22, 2018
|
|
What are some other useful things that SQL lets us do?
|
|
18
|
24109
|
August 13, 2024
|
|
What if we only want to delete a specific number of rows?
|
|
31
|
77997
|
November 14, 2023
|
|
When using a CASE statement, do the values for THEN have to be a single type?
|
|
37
|
43603
|
July 25, 2023
|