87 lines
2.4 KiB
SQL
87 lines
2.4 KiB
SQL
-- Databricks notebook source
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-- =============================================================================
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-- Purpose : Build the flattened IMS ATC level 1-4 hierarchy.
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-- Source : dwd.dwd_ims_td_therapeutic_class
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-- Target : dwd.dwd_ims_atc_hierarchy
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-- Grain : One row per hierarchy path rooted at ATC1_CODE; lower levels may be null.
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-- Write mode : Full refresh (INSERT OVERWRITE).
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-- Downstream : dwd.dwd_ims_td_pack_property, dws.dws_ims_td_atc_cn
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-- Notes : Parent-code matching is preserved from the legacy script.
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-- =============================================================================
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INSERT OVERWRITE TABLE dwd.dwd_ims_atc_hierarchy (
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ATC1_ID,
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ATC1_CODE,
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ATC1_DES,
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ATC2_ID,
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ATC2_CODE,
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ATC2_DES,
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ATC3_ID,
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ATC3_CODE,
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ATC3_DES,
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ATC4_ID,
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ATC4_CODE,
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ATC4_DES
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)
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WITH therapeutic_class AS (
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SELECT
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therapeutic_id,
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therapeutic_code,
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therapeutic_name,
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therapeutic_level
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FROM dwd.dwd_ims_td_therapeutic_class
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),
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atc_level_1 AS (
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SELECT
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therapeutic_id AS atc1_id,
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therapeutic_code AS atc1_code,
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therapeutic_name AS atc1_des
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FROM therapeutic_class
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WHERE therapeutic_level = '1'
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),
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atc_level_2 AS (
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SELECT
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therapeutic_id AS atc2_id,
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therapeutic_code AS atc2_code,
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therapeutic_name AS atc2_des
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FROM therapeutic_class
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WHERE therapeutic_level = '2'
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),
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atc_level_3 AS (
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SELECT
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therapeutic_id AS atc3_id,
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therapeutic_code AS atc3_code,
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therapeutic_name AS atc3_des
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FROM therapeutic_class
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WHERE therapeutic_level = '3'
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),
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atc_level_4 AS (
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SELECT
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therapeutic_id AS atc4_id,
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therapeutic_code AS atc4_code,
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therapeutic_name AS atc4_des
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FROM therapeutic_class
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WHERE therapeutic_level = '4'
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)
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SELECT
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atc_level_1.atc1_id,
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atc_level_1.atc1_code,
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atc_level_1.atc1_des,
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atc_level_2.atc2_id,
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atc_level_2.atc2_code,
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atc_level_2.atc2_des,
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atc_level_3.atc3_id,
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atc_level_3.atc3_code,
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atc_level_3.atc3_des,
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atc_level_4.atc4_id,
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atc_level_4.atc4_code,
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atc_level_4.atc4_des
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FROM atc_level_1
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LEFT JOIN atc_level_2
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ON atc_level_1.atc1_code = LEFT(atc_level_2.atc2_code, 1)
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LEFT JOIN atc_level_3
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ON atc_level_2.atc2_code = LEFT(atc_level_3.atc3_code, 3)
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LEFT JOIN atc_level_4
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ON atc_level_3.atc3_code = LEFT(atc_level_4.atc4_code, 4)
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;
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