Add EXTERNAL SQL scripts

EXTERNAL/CHPA/02 dws_ims_td_date.sql

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+-- Databricks notebook source
+-- 依赖事实表 tmp.tmp_ims_tf_fact_sales； 所以一定要放后面。
+--基于Fact数据动态计算时间维度 最近五年
+insert overwrite table dws.dws_ims_td_date
+select distinct 
+YM,
+left(cast(YM as string),4) as YEAR,
+right(cast(YM as string),2) as MONTH,
+concat(
+  'Q',quarter(
+    date(
+      concat(
+        left(cast(YM as string),4),'-',right(cast(YM as string),2),'-01'
+          )))) as QUARTER,
+concat(
+  left(cast(YM as string),4),'Q',quarter(
+    date(
+      concat(
+        left(cast(YM as string),4),'-',right(cast(YM as string),2),'-01'
+          )))) as YQ,
+case when YM=(select max(YM) from tmp.tmp_ims_tf_fact_sales) then 'R' else right(cast(YM as string),2) end as DATE_FLAG,
+case when YM%100>6 then concat(left(cast(YM as string),4),'H2') else concat(left(cast(YM as string),4),'H1') end as HALF_YEAR,
+from_utc_timestamp(current_timestamp(),'UTC+8'),
+from_utc_timestamp(current_timestamp(),'UTC+8')
+from   tmp.tmp_ims_tf_fact_sales
+where YM > (select max(YM)-900 from tmp.tmp_ims_tf_fact_sales)
+order by YM desc
+;