如何根据 sql 中另一个表的计数创建一个新表

Question

Lets say that i have this table in mariadb:

Table1:

Col1	Col2	Col3
Test1	Done	01-08-2021
Test2	Done	01-08-2021
Test3	Waiting	02-08-2021
Test4	Done	01-08-2021
Test5	Fail	01-08-2021
Test6	Done with errors	01-08-2021
Test7	Finished	03-09-2021
Test8	Failed with many errors	10-08-2021
Test9	Not tested yet	10-10-2021

How can i make an sql query so i can have an output like this:

Table2

Col1	Col2
Finished	5
Waiting to be finished	2
Failed	2

So baically, what i want is to count the numbers of rows in Table1 which contain: Done, Done with errows or Finshed and to write that number in row Finished in Table2. For the rows in Table1 that contain: Fail and Failed with many errors to be written to row Failed in Table2. For the rows in Table1 that contain Waiting and Not tested yet to be written to row Waiting to be finished in Table2.

Answer 1

You may aggregate using a CASE expression:

SELECT
    CASE WHEN Col2 IN ('Done', 'Done with errors', 'Finished') THEN 'Finished'
         WHEN Col2 LIKE '%fail%' OR Col2 LIKE '%Fail%' THEN 'Failed'
         WHEN Col2 IN ('Waiting', 'Not tested yet') THEN 'Waiting to be finished'
    END AS Col1,
    COUNT(*) AS Col2
FROM Table1
GROUP BY 1;

Demo

Answer 2

SELECT statuses.col1, COUNT(*)
FROM source_table
JOIN ( SELECT 'Finished' col1, 'Done' col2 UNION ALL
       SELECT 'Finished', 'Done with errors' UNION ALL
       SELECT 'Finished', 'Finished' UNION ALL 
       SELECT 'Failed', 'Fail' UNION ALL 
       SELECT 'Failed', 'Failed with many errors' UNION ALL 
       SELECT 'Waiting to be finished', 'Waiting' UNION ALL 
       SELECT 'Waiting to be finished', 'Not tested yet' ) statuses USING (col2)
GROUP BY statuses.col1;

The best way - create static table statuses with shown data and use it instead of dynamic subquery.