需要将SQL查询转换为Gorm查询。

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英文:

Need to convert the SQL Query to Gorm query

问题

我有这个SQL查询:

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 

我想将其转换为Gorm。我可以使用以下方式:

err = s.db.Exec("...QUERY")

但是我无法从上述查询中提取数据。我需要提取上述所有字段(Full Name、User ID等)并将它们存储在一个结构体中。

在上述查询中,kafka_user_stream和jackpot_message是从kafka流中提取的表。我正在使用go-gorm和go语言。

我尝试了Gorm文档以及其他一些参考资料,但是我无法找到任何解决方案。非常感谢任何线索、见解或帮助。

英文:

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.

答案1

得分: 1

使用原生的go/mysql驱动程序,你应该使用Query()Scan()方法从数据库中获取结果,并将其存储在一个结构体中,而不是使用Exec()方法。

在GORM中,你可以使用SQL Builder来进行自定义查询:

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)
英文:

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)

答案2

得分: 0

我找到了一种稍微不同的方法,正如Aykut建议的那样,它可以正常工作。

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()
英文:

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()

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  • 本文由 发表于 2021年11月3日 16:30:40
  • 转载请务必保留本文链接:https://go.coder-hub.com/69821731.html
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