DB 2

[SQL] ๊ทธ๋ฃน๋ณ„ 1๊ฑด๋งŒ ์กฐํšŒํ•˜๋Š” ๋ฐฉ๋ฒ• LEFT JOIN, ROW_NUMBER

๐Ÿ“‚ ๋ชฉ์ฐจ ์˜ˆ์‹œ ์ฟผ๋ฆฌ ํ™•์ธํ•˜๊ธฐWITH RankedData AS ( SELECT a.OrderID, c.SafeKey, ROW_NUMBER() OVER (PARTITION BY a.OrderID ORDER BY c.SafeKey) AS rn FROM SalesDB.dbo.Orders a LEFT OUTER JOIN SalesDB.dbo.CreditCheckResult b ON a.CreditCheckID = b.ID LEFT OUTER JOIN SalesDB.dbo.SafeKeyLog c ON c.SafeKey = b.SafeKey WHERE a.OrderID IN ( 10001, 10002, 100..

DB 2025.04.07

Windows OS ํ™˜๊ฒฝ์—์„œ PostgreSQL ์„ค์น˜ํ•˜๊ธฐ

์œˆ๋„์šฐ ํ™˜๊ฒฝ์—์„œ PostgreSQL์„ ์„ค์น˜ํ•˜๋Š” ๋ฐฉ๋ฒ•์— ๋Œ€ํ•ด ์ž์„ธํžˆ ์•Œ์•„๋ณด๊ฒ ์Šต๋‹ˆ๋‹ค. PostgreSQL์€ ๊ฐ•๋ ฅํ•œ ์˜คํ”ˆ ์†Œ์Šค ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ๊ด€๋ฆฌ ์‹œ์Šคํ…œ์œผ๋กœ, ๋‹ค์–‘ํ•œ ๊ธฐ๋Šฅ๊ณผ ์•ˆ์ •์„ฑ์„ ์ œ๊ณตํ•˜์—ฌ ๋งŽ์€ ๊ฐœ๋ฐœ์ž๋“ค ์‚ฌ์ด์—์„œ ์ธ๊ธฐ๊ฐ€ ๋†’์Šต๋‹ˆ๋‹ค. ์ด์ œ ๋ณธ๊ฒฉ์ ์œผ๋กœ ์„ค์น˜ ๊ณผ์ •์„ ์‹œ์ž‘ํ•ด๋ด…์‹œ๋‹ค(โ´โ—ก`โ) PostgreSQL ์„ค์น˜ํ•˜๊ธฐ ๊ฐ€์ด๋“œ ๋จผ์ € PostgreSQL ๊ณต์‹ ์›น์‚ฌ์ดํŠธ์—์„œ ์„ค์น˜ ํŒŒ์ผ์„ ๋‹ค์šด๋กœ๋“œํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค. ์•„๋ž˜ ๋งํฌ๋ฅผ ํด๋ฆญํ•˜์—ฌ ๋‹ค์šด๋กœ๋“œ ํŽ˜์ด์ง€๋กœ ์ด๋™ํ•ฉ๋‹ˆ๋‹ค.https://www.postgresql.org/  PostgreSQLThe world's most advanced open source database.www.postgresql.org   PostgreSQL ์„ค์น˜ ๋‹ค์šด๋กœ๋“œ1. ํ™ˆํŽ˜์ด์ง€์—์„œ ์Šคํฌ๋กคํ•˜๋ฉด ํ•˜๋‹จ์— Downlo..

DB 2024.05.26