1) SQL kya hai?

SQL (Structured Query Language) ek standard language hai jo RDBMS ko instructions deti hai:

• data read karna (queries)
• data insert/update/delete karna
• tables/constraints/views create/modify karna
• permissions/transactions manage karna

Simple: SQL = DB se baat karne ki language.

Must know: SQL ek standard hai, but har DB ka apna “dialect” hota hai:

• MySQL SQL, PostgreSQL SQL, SQL Server T-SQL, Oracle SQL (thoda different syntax/features)

2) CRUD ka correct mapping

Tumne likha: “CREATE - execute INSERT statements…”

Actually CRUD ka “Create” application sense me hota hai (new record add), aur SQL me wo INSERT se hota hai.

CRUD → SQL

• Create (record) → INSERT
• Read → SELECT
• Update → UPDATE
• Delete → DELETE

Extra clarity: SQL me “CREATE” word bhi hota hai, but wo DDL me aata hai:

• CREATE DATABASE