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#𝗦𝗤𝗟 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄 𝗖𝗵𝗲𝗮𝘁𝘀𝗵𝗲𝗲𝘁 → 𝗖𝗿𝗮𝗰𝗸 𝗔𝗻𝘆 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄 𝗪𝗶𝘁𝗵 𝗧𝗵𝗲𝘀𝗲 𝗖𝗼𝗻𝗰𝗲𝗽𝘁𝘀 ➜ 𝟭. 𝗦𝗤𝗟 𝗝𝗼𝗶𝗻𝘀 → Combine data from multiple tables 🡆 INNER JOIN → Returns matching records from both tables 🡆 LEFT JOIN → Returns all records from the left table + matches from the right 🡆 RIGHT JOIN → Returns all records from the right table + matches from the left 🡆 FULL JOIN → Returns all records from both tables ➜ 𝟮. 𝗗𝗔𝗧𝗔 𝗙𝗜𝗟𝗧𝗘𝗥𝗜𝗡𝗚 → Retrieve specific records efficiently 🡆 WHERE → Filters rows before aggregation 🡆 HAVING → Filters after aggregation 🡆 BETWEEN, IN, LIKE → Advanced filtering ➜ 𝟯. 𝗔𝗚𝗚𝗥𝗘𝗚𝗔𝗧𝗜𝗢𝗡 & 𝗚𝗥𝗢𝗨𝗣𝗜𝗡𝗚 → Summarize data 🡆 GROUP BY → Groups data based on a column 🡆 COUNT, SUM, AVG, MIN, MAX → Perform calculations ➜ 𝟰. 𝗦𝗨𝗕𝗤𝗨𝗘𝗥𝗜𝗘𝗦 & 𝗖𝗧𝗘𝘀 → Break complex queries 🡆 Subquery → Nested query inside another query 🡆 Common Table Expressions (CTE) → Temporary named query ➜ 𝟱. 𝗜𝗡𝗗𝗘𝗫𝗜𝗡𝗚 & 𝗢𝗣𝗧𝗜𝗠𝗜𝗭𝗔𝗧𝗜𝗢𝗡 → Speed up queries 🡆 Indexes → Improve search speed 🡆 EXPLAIN PLAN → Analyze query performance ➜ 𝟲. 𝗔𝗗𝗩𝗔𝗡𝗖𝗘𝗗 𝗦𝗤𝗟 𝗧𝗢𝗣𝗜𝗖𝗦 🡆 Window Functions → RANK, ROW_NUMBER, LEAD, LAG 🡆 Stored Procedures & Triggers → Automate tasks 🡆 Normalization & Denormalization → Optimize database design ⚡️ BEST DATA SCIENCE CHANNELS ON TELEGRAM 🌟

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