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Developer-C 11.1
3.0
4.0
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
5.5
5.6
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18
11g Release 2
18c
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8.4
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9.5
9.6
10
11
12
13
14
15
16
3.8
3.16
3.27
3.39
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2.11
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2.6
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Sakila
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AdventureWorks
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AdventureWorks
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WITH yourTable AS ( SELECT 'John' AS name UNION ALL SELECT 'John,2345' UNION ALL SELECT 'Joe,1234' UNION ALL SELECT 'Joe' UNION ALL SELECT 'Joe,1234' UNION ALL SELECT 'John' UNION ALL SELECT 'John,2345' UNION ALL SELECT 'John,2345' UNION ALL SELECT 'Smith' UNION ALL SELECT 'Smith' ) SELECT CONCAT('("', MAX(name), '",', COUNT(*), ')') AS output FROM ( SELECT name, SUBSTRING_INDEX(name, ',', 1) AS name_only FROM yourTable ) t GROUP BY name_only;
output
("Joe,1234",3)
("John,2345",5)
("Smith",2)