Need to convert the SQL Query to Gorm query - mysql

Question

I have this SQL query
Select CONCAT(kafka_user_stream.FirstName,' ', kafka_user_stream.LastName) AS "Full Name",
kafka_user_stream.UID AS "User ID",
kafka_user_stream.CountryCode AS "Country",
kafka_user_stream.CreatedAt AS "Registration Date & Time",
COUNT(jackpotmessage_stream.UID) AS "Win Count"
FROM kafka_user_stream LEFT JOIN
jackpotmessage_stream ON jackpotmessage_stream.UID = kafka_user_stream.UID
WHERE "Type"='goldenTicketWin'
GROUP BY "Full Name", "User ID", "Country", "Registration Date & Time"
ORDER BY "Win Count" DESC
I want to convert it to Gorm. I can use it using
err = s.db.Exec("...QUERY")
but i cannot extract data from the above query. I need to extract all of the above fields (Full Name, User ID etc) and store them in a struct.
In above query, kafka_user_stream and jackpot_message are the tables extracted from a kafka stream. I am using go-gorm and go.
I tried the Gorm documentation as well as few other references but I am unable to find any solution. Would be very thankful for any leads, insight or help.

Answer 1

With native go/mysql driver, you should use Query() and Scan() methods to get results from the database and store them in a struct, not Exec().
In GORM, you can use SQL Builder for your custom queries:
type Result struct {
ID int
Name string
Age int
}
var result Result
db.Raw("SELECT id, name, age FROM users WHERE name = ?", 3).Scan(&result)

Answer 2

I figured out a slightly different way as suggested by Aykut which works fine.
rows, _err := s.gdb.Raw(`Select CONCAT(kafka_user_stream.FirstName,' ', kafka_user_stream.LastName) AS "FullName",
kafka_user_stream.UID AS "UserID",
kafka_user_stream.CountryCode AS "Country",
kafka_user_stream.CreatedAt AS "CreatedAt",
COUNT(jackpotmessage_stream.UID) AS "WinCount"
FROM kafka_user_stream LEFT JOIN
jackpotmessage_stream ON jackpotmessage_stream.UID = kafka_user_stream.UID
WHERE "Type"='goldenTicketWin'
GROUP BY "FullName", "UserID", "Country", "CreatedAt"
ORDER BY "WinCount" DESC;`).Rows()