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Introduction to SQL
www.stat.berkeley.eduIntroduction to SQL Some Relational Database Concepts I A database server can contain many databases I Databases are collections of tables I Tables are two-dimensional with rows (observations) and columns (variables) I Limited mathematical and summary operations available I Very good at combining information from several tables
Database Concepts
ncert.nic.inDatabase Concepts. “Inconsistency of your mind... Can damage your memory... Remove the inconsistent data... And keep the original one !!!” — Nisarga Jain. 7.1 IntroductIon. After learning about importance of data in the previous chapter, we need to explore the methods to store and manage data electronically.