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6.6

SQL query help needed

Asked by totsubo in Databases Miscellaneous

I have two tables as follows:

INVOICES:

id integer primary key
req_del_date1 date
req_del_date2 date
req_del_date3 date
cancelled boolean
ship_separately boolean

INVOICE_LI:

invoice_id references(id) in INVOICES
prod_id references(id) in PRODUCTS
quantity integer
cancelled boolean
received boolean
shipped boolean
ship_now boolean

I need to know which products are needed to fill invoices that can be shipped and how many of each product. The criteria for a shippable invoice are:

- are not cancelled
- the max of the three requested delivery dates is more than 8 days away.
- have at least one line item that is received
- if the ship_separately field is false then *all* line items for that invoice that have not already been shipped or cancelled must be received, OR at least one line-item has cancelled = false, shipped = false and ship_now = true

In order to help figure out if the requested delivery dates are more than 8 days away I have written a database function that returns true if either of the three dates if more than 8 days away. I use it like this:

select max(req_del_date1,req_del_date2,req_del_date3) > (timestamp'today' - interval'8 days') from invoices;

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20091021-EE-VQP-81

SQL query help needed

Asked by totsubo in Databases Miscellaneous

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