Local & Global Temp Tables, Table Variable, CTE + Full CRUD in SQL Server
Complete SQL Server tutorial in HINDI — सीखें Local & Global Temporary Tables (#temp, ##temp), Table Variables (@table), CTEs (WITH ...) और पूरा CRUD (Create Database, Create Table, INSERT, UPDATE, DELETE).
Keywords: SQL Server, SQL Tutorial in Hindi, Temporary Table, Table Variable, CTE, CRUD, Create Database, Create Table.
🎯 What you'll learn (quick):
कैसे Create Database और Create Table करें
INSERT, UPDATE, DELETE — CRUD on permanent tables
Local Temp Table (#temp) — session scope + CRUD demo
Global Temp Table (##temp) — multi-session use-case
Table Variable (DECLARE @T TABLE(...)) — syntax, when to use
CTE (Common Table Expression) — recursive and non-recursive examples
Performance tips: when to use temp table vs table variable vs CTE
⚠️ Quick notes (must-know):
#temp = local, session-scoped; ##temp = global (visible across sessions).
Table variables (@) are memory-optimized for small sets, but lack statistics (affects query plans).
CTEs are not stored objects — used for query readability & recursion.
For large intermediate datasets use temp tables; for tiny sets table variable is fine.
👉 Resources & code: Check the pinned comment for the full SQL script and downloadable .sql file.
👍 If this helped: Like + Subscribe + Share — it helps reach more devs in Hindi!
🗨️ Tell me in comments: Which example should I expand next? Indexes on temp tables? Transactions + temp tables?
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