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SQL is used to perform operations on the records stored in the database, such as updating records, inserting records, deleting

SQL Keywords Keyword, Description ADD, Adds a column in an existing table ADD CONSTRAINT, Adds a constraint after a table Queries in NoSQL databases can be faster than SQL databases Why? Data in SQL databases is typically normalized, so queries for a single object or entity

กระดูกสันหลังทับเส้นประสาท What you'll learn Database structures Before you learn more about SQL we'll help you understand how data is stored in a database SQL queries Select, sort Introduction to SQL This is a beginner's course for those who would like to learn SQL-Structural Query language, a language used in querying and manipulating