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Daily Betters in One Query
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Daily Betters in One Query

MediumSQL · PostgreSQL

Problem

Identify users who have placed a bet every day for the last week using a single query for BetMGM.

Use the latest bet date in bets as the end of the seven-day period. Count a user as active for a day if they placed at least one bet that day.

Output

  1. Return one row per qualifying user with user_id and username.
  2. Include only users active on all seven calendar days.
  3. Order by user_id ascending.

Schema

users
ColumnTypeDescription
user_idPKINTUnique BetMGM user identifier
usernameVARCHAR(100)User display name
bets
ColumnTypeDescription
bet_idPKINTUnique bet identifier
user_idINTUser who placed the bet
bet_dateDATECalendar date when the bet was placed
Tablesusersbets
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