[英]Grafana: SQL query - Apply "filter" to "count"
我试图在我的 SQL 查询中将过滤器应用于“计数”,但无法找出正确的方法。
左表的查询显示了错误类型可能具有的不同错误级别。 就我而言,“0 到 3”,其中 0 表示信息,3 表示关键错误。
SELECT
stringsplit(alerts.Source, " - ", 1) AS ERROR_Level,
stringsplit(alerts.Source, " - ", 2) AS ERROR_Type
FROM alerts
右表的查询显示了总体错误计数。 (出于演示目的,我在实数中添加了一些随机数。)
第一列显示错误类型,第二列显示错误总数。
从第 3 列开始,我只想过滤定义为 3 级的错误。
下一列错误级别 2 等等...
SELECT
stringsplit(alerts.Source, " - ", 2) AS ERROR_Type,
COUNT(alerts.Source)+100 AS ERROR_Count,
COUNT(alerts.Source)+73 AS ERROR_Critical,
# COUNT(alerts.Source) FILTER(WHERE stringsplit(alerts.Source, " - ", 1) = 3) AS critical,
COUNT(alerts.Source)+30 AS ERROR_Warning
# COUNT(alerts.Source) FILTER(WHERE stringsplit(alerts.Source, " - ", 1) = 2) AS warning
FROM alerts
GROUP BY ERROR_Type
正如你在上面的代码中看到的那样......
stringsplit(alerts.Source, " - ", 1)
打印出错误级别
stringsplit(alerts.Source, " - ", 2)
打印出错误类型
我用 SUM 解决了它。
SELECT
stringsplit(alerts.Source, " - ", 2) AS error_type,
COUNT(alerts.Source) AS total,
SUM(IF(stringsplit(alerts.Source, " - ", 1) = 3,1,0)) AS critical_errors,
SUM(IF(stringsplit(alerts.Source, " - ", 1) = 2,1,0)) AS errors,
SUM(IF(stringsplit(alerts.Source, " - ", 1) = 1,1,0)) AS warnings,
SUM(IF(stringsplit(alerts.Source, " - ", 1) = 0,1,0)) AS informations
FROM alerts
GROUP BY ERROR_Type
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