Free practice · Interactive SQL · medium

Practice

Find open high-priority tickets

Return ticket_id and priority for High-priority tickets whose closed_date is missing.

Practice database

US customer support database

Fictional customer and support-ticket data for text, date, and NULL practice.

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Table relationships
support_tickets.customer_idcustomers.customer_id

customers

Customer profile fields used for account reporting.

6 rows

Grain One row per customer

  • customer_idTEXTPK
  • customer_nameTEXT
  • cityTEXT
  • state_codeTEXT
  • segmentTEXT
  • signup_dateTEXT
Preview source rows
customer_idcustomer_namecitystate_codesegmentsignup_date
C-101Northstar HealthAustinTXHealthcare2025-11-15
C-102Blue Ridge BooksRichmondVARetail2025-12-01
C-103Pacific Office WorksSan DiegoCAMidmarket2026-01-08

support_tickets

Customer support requests with intentionally untidy subjects.

5 rows

Grain One row per support ticket

  • ticket_idTEXTPK
  • customer_idTEXTFK
  • opened_dateTEXT
  • closed_dateTEXT
  • priorityTEXT
  • subjectTEXT
  • channelTEXT
  • resolution_hoursREAL
Preview source rows
ticket_idcustomer_idopened_dateclosed_dateprioritysubjectchannelresolution_hours
T-301C-1012026-02-252026-02-26Normal Billing issue email5
T-302C-1022026-03-02NULLHighLOGIN HELPwebNULL
T-303C-1032026-03-102026-03-12Normalshipping Delayphone18

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