MIN

Description

The MIN function returns the minimum non-NULL value of the expression.

Syntax

MIN(<expr>)

Parameters

Parameters	Description
<expr>	The expression to get the value. Supported types are String, Time, Date, DateTime, IPv4, IPv6, TinyInt, SmallInt, Integer, BigInt, LargeInt, Float, Double, Decimal.

Return Value

Returns the same data type as the input expression. If all records in the group are NULL, the function returns NULL.

Example

-- setup
create table t1(
        k1 int,
        k_string varchar(100),
        k_decimal decimal(10, 2)
) distributed by hash (k1) buckets 1
properties ("replication_num"="1");
insert into t1 values 
    (1, 'apple', 10.01),
    (1, 'banana', 20.02),
    (2, 'orange', 30.03),
    (2, null, null),
    (3, null, null);

select k1, min(k_string) from t1 group by k1;

String type: For each group, returns the minimum string value.

+------+---------------+
| k1   | min(k_string) |
+------+---------------+
|    1 | apple         |
|    2 | orange        |
|    3 | NULL          |
+------+---------------+

select k1, min(k_decimal) from t1 group by k1;

Decimal type: Returns the minimum high-precision decimal value.

+------+----------------+
| k1   | min(k_decimal) |
+------+----------------+
|    1 |          10.01 |
|    2 |          30.03 |
|    3 |           NULL |
+------+----------------+

select min(k_string) from t1 where k1 = 3;

When all values in the group are NULL, returns NULL.

+---------------+
| min(k_string) |
+---------------+
| NULL          |
+---------------+

select min(k_string) from t1;

Minimum value of all data.

+---------------+
| min(k_string) |
+---------------+
| apple         |
+---------------+