CS代考 COMP 421 @ McGill 1
The Relational Model COMP 421 @ McGill 1 Database Models Copyright By PowCoder代写 加微信 powcoder • Theentity-relationshipisasemanticmodel(quite rich in its expressiveness) but it is not used as a model in any DBS. • Relationalmodel – Most common – Vendors: IBM DB2, Microsoft SQL Server, Oracle, SAP Hana, SAP Sybase, etc… – Open-source: PostgreSQL, MySQL, SQLite, […]
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