MIN_IF (Lakehouse v1)

后缀 _IF 可以附加到任何聚合函数的名称之后。此时，聚合函数会接受一个额外的参数，即条件。

Analyze 语法

func.min_if(<column>, <cond>)

Analyze 示例

func.min_if(table.budget, table.departing=='IT').alias('min_it_budget')

| min_it_budget |
|---------------|
|     2000      |

SQL 语法

MIN_IF(<column>, <cond>)

SQL 示例

创建表并插入示例数据

CREATE TABLE project_budgets (
  id INT,
  project_id INT,
  department VARCHAR,
  budget FLOAT
);

INSERT INTO project_budgets (id, project_id, department, budget)
VALUES (1, 1, 'HR', 1000),
       (2, 1, 'IT', 2000),
       (3, 1, 'Marketing', 3000),
       (4, 2, 'HR', 1500),
       (5, 2, 'IT', 2500);

查询演示：查找 IT 部门的最低预算

SELECT MIN_IF(budget, department = 'IT') AS min_it_budget
FROM project_budgets;

结果

| min_it_budget |
|---------------|
|     2000      |