Teradata 需要帮助计算第90百分位吗

此查询结果有以下错误：

[Teradata数据库][TeraJDBC 15.10.00.22][错误3707][SQLState 42000]语法错误，应为名称或Unicode “'）和“OVER”关键字之间的分隔标识符

.

试试看

SELECT
     session_start_dt
    ,PERCENTILE_CONT(0.9) WITHIN GROUP (ORDER BY excess_wait)
        OVER (PARTITION BY session_start_dt)
FROM Excess_Wait_AB  

这是另一种选择：

SELECT
     session_start_dt
    , PERCENTILE_CONT(0.9) WITHIN GROUP (ORDER BY excess_wait) as pcntl
FROM Excess_Wait_AB

---

解释了它们之间的差异。

请在每行前面加上4个空格来设置源代码的格式。Teradata仅支持聚合版本的

PERCENTILE_CONT

，请参阅

SELECT
     session_start_dt
    , PERCENTILE_DISC(0.9) WITHIN GROUP (ORDER BY excess_wait) as pcntl
FROM Excess_Wait_AB