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Second-Highest Per Warehouse
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Second-Highest Per Warehouse

MediumSQL · PostgreSQL

Problem

Write a SQL query using window functions to find the second-highest sales volume day for each warehouse at Zebra Technologies.

Use the warehouses and sales tables. Treat the second-highest volume as the second distinct daily total, and include tied days at that level.

Output

  1. One row per qualifying warehouse and date, with warehouse_id, warehouse_name, sale_date, and sales_volume.
  2. Include only warehouses with a second-highest day, ordered by warehouse_id and sale_date.

Schema

warehouses
ColumnTypeDescription
warehouse_idPKINTEGERUnique warehouse identifier
warehouse_nameVARCHAR(100)Warehouse name
regionVARCHAR(50)Operational region for the warehouse
sales
ColumnTypeDescription
sale_idPKINTEGERUnique sales record identifier
warehouse_idINTEGERWarehouse associated with the sale
sale_dateDATEDate on which the sale occurred
units_soldINTEGERNumber of units sold in the record
Tableswarehousessales
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CodePostgreSQL
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