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SQL Query Interpretation
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SQL Query Interpretation

MediumSQL · PostgreSQL

Problem

Interpret a SQL statement and explain what it returns.

You are given the SQL text and the referenced tables. Describe the result set precisely, including which rows appear, how they are ordered, and any rows excluded by the logic.

Output

  1. State the result at the same grain as the query output.
  2. List the output columns in order, using the exact column names or aliases from the statement.
  3. Include the ordering rules and any rows excluded from the result.

Schema

accounts
ColumnTypeDescription
account_idPKINTUnique account identifier
member_nameVARCHAR(100)Member name
segmentVARCHAR(30)Member segment
transactions
ColumnTypeDescription
transaction_idPKINTUnique transaction identifier
account_idINTAccount that made the transaction
transaction_dateDATETransaction date
amountNUMERIC(10,2)Transaction amount
statusVARCHAR(20)Transaction status
Tablesaccountstransactions
Interviewer

Your question is SQL Query Interpretation. Start with the requirements and the two tables in the Question tab.

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