SQL interview prep pack
$4 = 4 USDC on Base · instant download
30 SQL interview questions with solutions: joins, aggregations, window functions, CTEs, dedupe, top-N per group, retention and funnels.
What you get
- Basics
- Window functions
- Dedupe & data quality
- CTEs & analytics
- Joins & logic
- Performance talk
Format: Markdown (.md) + JSON in a zip. Instant download after payment, link valid 7 days.
How to buy (2 min)
- Click Buy — you get a unique amount (e.g. 4.00xxxx USDC).
- Send exactly that amount of USDC on Base from any wallet (Coinbase Wallet, MetaMask, Rainbow…). Scan QR or tap "Open in wallet".
- Click I paid — check. When the payment is seen on Base (~10 s) your download appears.
Buy for 4 USDC →
No account, no login, no email. Network: Base (8453) · Token: USDC · Receive wallet: 0x7B97303d62517eA9E26D1E1b199Eac42a487F430