Custom query with group by and then count - mysql

Question

I am using events.I would like to know how to calculate sum in event or using single query
http://sqlfiddle.com/#!9/ad6d1c/1
DDL for question:
CREATE TABLE `table1` (
`id` int(11) NOT NULL,
`group_id` int(11) NOT NULL DEFAULT '0',
`in_use` tinyint(1) NOT NULL DEFAULT '1' COMMENT '0->in_use,1->not_in_use',
`auto_assign` tinyint(1) NOT NULL DEFAULT '0' COMMENT '0->Yes,1->No'
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
ALTER TABLE `table1`
ADD PRIMARY KEY (`id`);
ALTER TABLE `table1`
MODIFY `id` int(11) NOT NULL AUTO_INCREMENT;
INSERT INTO `table1` (`id`, `group_id`, `in_use`, `auto_assign`) VALUES
(1, 3, 1, 0),(2, 2, 0,1),(3, 1, 1, 1),(4, 3, 1, 0),(5, 3, 0, 0),(6, 3, 0, 1),
(7, 3, 1, 0),(8, 3, 0, 1),(9, 3, 0, 1),(10, 3, 0, 1),(11, 3, 0, 1),(12, 3, 1, 1),
(13, 3, 1, 0),(14, 3, 0, 0),(15, 3, 0, 0),(16, 3, 0, 0),(17, 3, 0, 0),(18, 3, 1, 1),
(19, 3, 0, 0),(20, 3, 0, 0)
Expected Output :
| count | in_use | auto_assign | sum | check_count |
|-------|--------|-------------|------|------------ |
| 7 | 0 | 0 | 11 | 5 |
| 5 | 0 | 1 | 07 | 3 |
| 4 | 1 | 0 | 11 | 5 |
| 2 | 1 | 1 | 07 | 3 |
Here we can see that auto_assign=0 have total 11 count(7+4) and
auto_assign=1 have 7 count(5+2) this count should be stored into new column sum.
check_count column is percentage value of sum column.Percentage will be predefined.
Lets take 50%, So count 11(sum column value) ->50% = 5.5 = ROUND(5.5) == 5(In integer). Same way count 7(sum column value)->50% = 3.5 =ROUND(3.5)=3(Integer)
Here 5 > 4(auto_assign=0 and in_use=1 ).So have to insert record into another table(table2). if not then not.
Same way, If 3 >2 then also need to insert record into another table(table2).if not then not.
Note : This logic I would like to implement in event
This is bit complicated, but please suggest me how to do this in event.
Detail clarification :
here percentage_Value is 5 for auto_assign =0.But auto_assign=0 and in_use=1 have count is 4 which less than 5 ,then have to insert record into table 2.
suppose,if we get count is 6 for auto_assign=0 and in_use=1 ,Then no need to insert record into table2.
Same way,
here percentage_Value is 3 for auto_assign =1.But auto_assign=1 and in_use=1 have count is 2 which less than 3 ,then have to insert record into table 2.
suppose,if we get count is 4 for auto_assign=1 and in_use=1 ,Then no need to insert record into table2.
Insert query into table2:
Insert into table2(cli_group_id,auto_assign,percentage_value,result_value) values(3,0,5,4)

Answer 1

DEMO Fiddle
Break the problem down: we need a count of the records by auto_Assigns; so we generate a derived table (B) with that value and join back to your base table on auto_Assign. This then gives us the column we need for some and we use the truncate function and a division model to get the check_count
SELECT count(*), in_use, A.Auto_Assign, B.SumC, truncate(B.SumC/2,0) as check_Count
FROM table1 A
INNER JOIN (Select Auto_Assign, count(*) sumC
from table1
where Group_ID = 3
Group by Auto_Assign) B
on A.Auto_Assign = B.Auto_Assign
WHERE GROUP_ID = 3
Group by in_use, A.Auto_Assign
we can eliminate the double where clause by joining on it:
SELECT count(*), in_use, A.Auto_Assign, B.SumC, truncate(B.SumC/2,0) as check_Count
FROM table1 A
INNER JOIN (Select Auto_Assign, count(*) sumC, Group_ID
from table1
where Group_ID = 3
Group by Auto_Assign, Group_ID) B
on A.Auto_Assign = B.Auto_Assign
and A.Group_ID = B.Group_ID
Group by in_use, A.Auto_Assign
I'd need clarification on the rest of the question: I'm not sure what 5 > 4 your'e looking at and I see no 3 other than the check count but that's not "the same way" so I'm not sure what you're after.
Here 5 > 4(auto_assign=0 and in_use=1 ).So have to insert record into another table(table2). if not then not.
Same way, If 3 >2 then also need to insert record into another table(table2).if not then not.
Note : This logic I would like to implement in event
This is bit complicated, but please suggest me how to do this in event.
So to create the event: DOCS
Which results in:
CREATE EVENT myevent
ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 6 Minutes
DO
INSERT INTO table2
SELECT count(*) as mCount
, in_use
, A.Auto_Assign
, B.SumC, truncate(B.SumC/2,0) as check_Count
FROM table1 A
INNER JOIN (SELECT Auto_Assign, count(*) sumC, Group_ID
FROM table1
WHERE Group_ID = 3
GROUP BY Auto_Assign, Group_ID) B
ON A.Auto_Assign = B.Auto_Assign
AND A.Group_ID = B.Group_ID
GROUP BY in_use, A.Auto_Assign