Learn how to create the SQL file corresponding to the workflow tasks of a Table to Table data operation.
🗺️ Overview
A SQL workflow is a sequence of tasks that feed tables in parallel or sequentially. It gives instructions to load, merge and reorganize data.
🛢️ SQL tasks
SQL tasks are steps from the workflow. Each SQL task is defined by a .sql file that contains the query. You can write the queries directly in the query editor of BigQuery and then save them into .sql files.
There can be only one SQL query for each task. If a table needs several SQL queries to be well loaded, you need to execute a task for each of them.
The name of the SQL file should be the same as the SQL task.
📹 SQL script video
From the sales, we will retrieve the weekly sales for each store for each category of alcohol sold and calculate the sales ratio as Pwisky + Prum + ... + Pspecial = Ptotal = 1.
#standardSQL
with week_categories as (
select
store_number,
store_name,
sale__dollars_ as sale_dollars,
volume_sold__liters_ as volume_sold_liters,
DATE_TRUNC(date, WEEK(monday)) as isoweek_monday,
EXTRACT(isoweek from date) as isoweek_number,
case when(LOWER(category_name) like '%vodka%') then 'vodka'
when(LOWER(category_name) like '%whiskies%') then 'whisky'
when(LOWER(category_name) like '%scotch%') then 'whisky'
when(LOWER(category_name) like '%bourbon%') then 'whisky'
when(LOWER(category_name) like '%rum%') then 'rum'
when(LOWER(category_name) like '%liqueur%') then 'liqueur'
when(LOWER(category_name) like '%triple sec%') then 'liqueur'
when(LOWER(category_name) like '%tequila%') then 'tequila'
when(LOWER(category_name) like '%schnapps%') then 'schnapps'
when(LOWER(category_name) like '%gin%') then 'gin'
when(LOWER(category_name) like '%cocktails%') then 'cocktail'
when(LOWER(category_name) like '%brandies%') then 'brandy'
when(LOWER(category_name) like '%mezcal%') then 'brandy'
when(LOWER(category_name) like '%spirit%') then 'spirit'
when(LOWER(category_name) like '%special%') then 'special_packages'
else 'others' end as cat_alcool
from `fd-io-jarvis-demo-dlk.dlk_demo_iowa_liquor_psa.sales_details_2019`
where date >= '2019-01-01' and date < '2020-01-01'
)
select
isoweek_monday,
isoweek_number,
store_name,
CAST(store_number as string) as store_number,
ROUND(SUM(sale_dollars), 2) as sale_dollars,
ROUND(SUM(volume_sold_liters), 2) as volume_sold_liters,
ROUND(
SUM(
case when(cat_alcool = 'vodka') then sale_dollars else 0 end
) / SUM(sale_dollars),
2
) as p_vodka,
ROUND(
SUM(
case when(cat_alcool = 'whisky') then sale_dollars else 0 end
) / SUM(sale_dollars),
2
) as p_whisky,
ROUND(
SUM(
case when(cat_alcool = 'rum') then sale_dollars else 0 end
) / SUM(sale_dollars),
2
) as p_rum,
ROUND(
SUM(
case when(cat_alcool = 'liqueur') then sale_dollars else 0 end
) / SUM(sale_dollars),
2
) as p_liqueur,
ROUND(
SUM(
case when(cat_alcool = 'tequila') then sale_dollars else 0 end
) / SUM(sale_dollars),
2
) as p_tequila,
ROUND(
SUM(
case when(cat_alcool = 'schnapps') then sale_dollars else 0 end
) / SUM(sale_dollars),
2
) as p_schnapps,
ROUND(
SUM(
case when(cat_alcool = 'gin') then sale_dollars else 0 end
) / SUM(sale_dollars),
2
) as p_gin,
ROUND(
SUM(
case when(cat_alcool = 'cocktail') then sale_dollars else 0 end
) / SUM(sale_dollars),
2
) as p_cocktail,
ROUND(
SUM(
case when(cat_alcool = 'brandy') then sale_dollars else 0 end
) / SUM(sale_dollars),
2
) as p_brandy,
ROUND(
SUM(
case when(cat_alcool = 'spirit') then sale_dollars else 0 end
) / SUM(sale_dollars),
2
) as p_spirit,
ROUND(
SUM(
case
when(cat_alcool = 'special_packages') then sale_dollars else 0
end
) / SUM(sale_dollars),
2
) as p_special
from week_categories
group by store_number, store_name, isoweek_number, isoweek_monday
