-- 1. CTE BÁSICA — Ventas por región WITH ventas_por_region AS ( SELECT region, COUNT(*) as total_ventas, SUM(monto) as total_monto, AVG(monto) as promedio_monto FROM ventas GROUP BY region ) SELECT * ...
A second-tab reference for Part 6: Excel, Power Query, and DAX translations; core SQL patterns; and the dialect differences that break copy-paste. Part 6 made the argument: move the question to the ...
If you have ever written a complex SQL query involving rankings, running totals, moving averages, top-N records, or comparing rows within the same dataset, chances are you have faced difficult joins, ...
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Abstract: The iceberg cubing problem is to compute the multidimensional group-by partitions that satisfy given aggregation constraints. Pruning unproductive computation for iceberg cubing when ...
这不是“日志文件有点大”的小毛病。Codex 正在把 TRACE 级网络事件、遥测镜像和依赖库噪声写进一个持久化 SQLite 库；文件可能只显示几百 MB，SSD 背后承受的写入却可能高得多。世界真就是一个大草台班子，看来 Codex 确实是 ...
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