SQL Counting Distinct Values From Table With multiple Where possibilities [duplicate] - mysql

Question

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How can I return pivot table output in MySQL?
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MySQL pivot table query with dynamic columns
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Closed 3 years ago.
The question is simple. How do i combine the following 2 sql queries into one.
I am using MYSQL v8.0.16 on the MYSQL Workbase UI.
SELECT Node_Type, COUNT(*) AS `count`
FROM node_table_vis
WHERE Node_SpinePlanID = "1"
GROUP BY Node_Type;
RETURNS
TYPE - COUNT
-----------
AGN 18
TJ 26
DSLAM 15
PON 18
CCJ 17
and
SELECT DISTINCT Node_SpinePlanID
FROM node_table_vis
WHERE Node_Exchange = "Exchange 1";
Thats returns
SpinePlanID
------------
1
5
10
So essentially what i want is query that looks like this?
SELECT Node_Type, COUNT(*) AS `count`
FROM node_table_vis
WHERE Node_SpinePlanID =
(
SELECT DISTINCT Node_SpinePlanID
FROM node_table_vis
WHERE Node_Exchange = "Exchange 1";
)
GROUP BY Node_Type;
So I get table that looks like
TYPE - 1 - 5 - 10
-----------------------
AGN 18 x y
TJ 26 x y
DSLAM 15 x y
PON 18 x y
CCJ 17 x y
So this is just throwing errors and not producing the goods. I was able to find the answer the top query, i was able to make the bottom, however i am unable to find an answer to combine both.
Any advice would be really appreciated.
UPDATE/EDIT
I have the following ...
SET ##group_concat_max_len = 10000;
SET #sql = null;
SELECT group_concat(distinct
concat(
'SUM(Node_SpinePlanID = ''',
Node_SpinePlanID,
''',) AS ',
Node_SpinePlanID
)
) INTO #sql
FROM node_table_vis;
SET #sql = CONCAT('SELECT Node_Type, ', #sql, ' FROM node_table_vis GROUP BY Node_Type');
PREPARE stmt FROM #sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
However the PREPARE stmt is not working? Getting error Code 1064 You have an SQL Error Syntax?
Any Advice on this one?

Answer 1

Are you looking for conditional aggregation?
SELECT Node_Type,
SUM(Node_SpinePlanID = 1) AS count_1,
SUM(Node_SpinePlanID = 5) AS count_5,
SUM(Node_SpinePlanID = 10) AS count_10
FROM node_table_vis
GROUP BY Node_Type;
You can also put the values into rows:
SELECT Node_Type, Node_SpinePlanID, COUNT(*) as cnt
FROM node_table_vis
GROUP BY Node_Type, Node_SpinePlanID;
Without dynamic SQL, probably the best you can do is to put the values in a single row is to put them in a string with two levels of aggregation:
SELECT Node_Type, GROUP_CONCAT(Node_SpinePlanID, ':', cnt SEPARATOR ',')
FROM (SELECT Node_Type, Node_SpinePlanID, COUNT(*) as cnt
FROM node_table_vis
GROUP BY Node_Type, Node_SpinePlanID
) ts
GROUP BY Node_Type;