SQL query to count in group by with specific condition

Question

My table data:

id      fieldId  Name   Text
----    ------  -----   ----
1        101    name1   a1
2        102    name2   a2
3        101    name1   a1
4               


        

Answer 1

Here.

SELECT
    `Name`,
    COUNT(*) AS 'fieldId',
    COUNT(IF(`Text` REGEXP '^a[1-3]',1,NULL)) AS 'a1a2a3'
FROM (SELECT * FROM `items` GROUP BY `Name`,`Text`) t1
GROUP BY `Name`;