如何在 Databricks SQL 中创建和使用地图

Question

我想创建一个地图并在同一个 SQL 查询中使用它。我正在尝试类似的东西

select sample_map[t1.col1], t1.col2 from table1 as t1, (select map(1,2,3,4)) as sample_map group by t1.col2;

Answer 1

检查以下

sql

查询。

SELECT 
    m.s_map[t1.col1] AS m_col1,
    t1.col2 AS col2
FROM table1 t1,
(SELECT map(1,2,3,4) as s_map) as m
GROUP BY col2, m_col1