How to implement OPENJSON Having JSON code as a text inside a column. How do i use OPENJSON on the column of a table in AZURE SQL Dataware House?

Eg: RAW DATA

| ORDER# | SUBORDER# |             DISCOUNTS          |
|------- |-----------| -------------------------------|
|   1    |    1-123  | '[{ discount:"1",amount:"1"}]' |
|   1    |    1-123  | '[{ discount:"2",amount:"2"}]' |

Want to apply OPENJSON on Discounts and have below OUTPUT:

| ORDER# | SUBORDER# | discount |   amount   |
|------- |-----------| ---------|------------|
|   1    |    1-123  |    1     |     1      |
|   1    |    1-123  |    2     |     2      |

Msg 137, Level 15, State 2, Line 44
Must declare the scalar variable "@discounts".

Answer

I’ve updated my answer, please add ; after the insert statement.

1. Create table and insert two rows:

create table dbo.test(

    ORDER# varchar(255),
    SUBORDER# varchar(255),
    DISCOUNTS varchar(255)
);

insert into dbo.test values ('1','1-123','[{ "discount":"1","amount":"1"}]');
insert into dbo.test values ('1','1-123','[{ "discount":"2","amount":"2"}]');

2. Then we can use following sql to query the data.

select ORDER#,SUBORDER#,A.*
from  dbo.test t
CROSS APPLY OPENJSON(t.DISCOUNTS) 
WITH (
    discount varchar(255),
    amount varchar(255)
) A;

3.The result is as follows: