生成 SQL 查询以统计上个月的唯一登录次数并对其进行排序
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在对 Cloud 控制台使用不同参数值时，或通过直接调用 Vertex AI API，您可以直接查询模型，并测试返回的结果。
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提示自由格式
"Consider a table with schema as described below.
' Column name - Description
' Username - username of the user logging in
' LicenseType - Either ""MultiUse"" or ""SingleUse""
' LoginTime - The datetime of the login event
As data analysis expert, please write a SQL query to show me the list of
users, their license types and the number of unique days on which the user
logged in for the last 3 calendar months. Sort it by highest count of logins
in a month to the lowest count of logins in a month."
响应
```sql
WITH MonthlyLogins AS (
SELECT
Username,
LicenseType,
DATE(LoginTime) AS LoginDate
FROM
YourTable
WHERE
LoginTime BETWEEN DATE('now', '-3 months') AND DATE('now')
),
UniqueLoginDays AS (
SELECT
Username,
LicenseType,
COUNT(DISTINCT LoginDate) AS UniqueLoginDays
FROM
MonthlyLogins
GROUP BY
Username,
LicenseType
)
SELECT
Username,
LicenseType,
UniqueLoginDays
FROM
UniqueLoginDays
ORDER BY
UniqueLoginDays DESC;
```
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