MIN_PART_DATE function finds the minimum value for the specified partition column of type DATE.

Syntax:

MIN_PART_DATE([db_name.]table_name [, column_name [, part_col=filter, ...]]); 

Parameters:

Notes:

• If column name is not specified, the first partition column is used
• Partition filter applied before finding the minimum value

Return Value:

• The minimum date for the specified partition
• NULL if the table or partition do not exist, or the table is empty

Return Type:

DATE.

Example 1:

Table db.orders is partitioned by local_date and has the following partitions:

Find the minimum value of the partition:

MIN_PART_DATE(db.orders); 

Result: 2014-12-02

Example 2:

Table db.sales is partitioned by country and local_date and has the following partitions:

Find the minimum value for local_date partition column for country US:

MIN_PARTITION_DATE(db.sales, local_date, country='US'); 

Result: 2014-12-02

Compatibility: PL/HQL extension.

Version: PL/HQL 0.01

See also:

• MAX_PART_DATE(table, colname, partition_spec)
• MAX_PART_STRING(table, colname, partition_spec)
• MIN_PART_STRING(table, colname, partition_spec)
• MAX_PART_INT(table, colname, partition_spec)
• MIN_PART_INT(table, colname, partition_spec)