SQL Server selecting data as array from two tables - sql

Question

I have a database in which there are two tables tableA, tableB. Now for each primary id in tableA there may be multiple rows in tableB.
Table A primary key (ServiceOrderId)
+----------------+-------+-------+-------------+
| ServiceOrderId | Tax | Total | OrderNumber |
+----------------+-------+-------+-------------+
| 12 | 45.00 | 347 | 1011 |
+----------------+-------+-------+-------------+
Table B foreign key (ServiceOrderId)
+----+-------------+---------------------+----------+-------+------+----------------+
| Id | ServiceName | ServiceDescription | Quantity | Price | Cost | ServiceOrderId |
+----+-------------+---------------------+----------+-------+------+----------------+
| 39 | MIN-C | Commercial Pretreat | NULL | 225 | 23 | 12 |
+----+-------------+---------------------+----------+-------+------+----------------+
| 40 | MIN-C | Commercial Pretreat | NULL | 225 | 25 | 12 |
+----+-------------+---------------------+----------+-------+------+----------------+
Is there a way in which I can fetch the values as an array of multiple rows of tableB with single row of tableA. Because when I am saving to database I am using temp table to save multiple rows of tableB with single row of tableA.
Query I am using
SELECT
ordr.*,
info.*
FROM
tblServiceOrder as ordr
JOIN
tblServiceOrderInfo as info ON ordr.ServiceOrderId = info.ServiceOrderId
But above query is giving two rows for each ServiceOrderId. I am using node api to fetch data. I want something like;
Object:{
objectA:{id:12,tax:45.00:total:347,ordernumber:1011},
objectB:[
{id:39,servicename:'MIN-C',description:'Commercial Pretreat',Quantity :NULL,Price:225,Cost:23,ServiceOrderId:12 },
{id:40,servicename:'MIN-C',description:'Commercial Pretreat',Quantity :NULL,Price:225,Cost:25,ServiceOrderId:12}
]
}

Answer 1

There are several solutions. The first one is to use your SELECT, but with adding ORDER BY ServiceOrderID and when data are converting to object, to use the first row only in the loop for new ServiceOrderId from ordr table and add every row for the data from info table.
Other possibility is to select data from ordr table only and for every row to make another select by ServiceOrderId from info table. This solution should not be used for huge tables.