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Transcript
MidRange Concepts Structured Query Language SQL SQL Comprehensive language for controlling and interacting with a database management system. • Developed by IBM in late 70’s • Standard language of Relational databases SQL Functions Data Definition Data Retrieval Data Manipulation Access Control Data Sharing Data Integrity Features & Benefits Vendor Independence Portable across computer systems IBM endorsement English like structure to statements Interactive “ad-hoc” queries Complete Database language Dynamic Data Definition SQL Statement Nonpositional Language Command Driven Commands are entered at command line Basic Inquiry SQL Commands Select: List column or field names From: Name of file Where: (optional) Conditions on record selection Order by: (optional) Specify sort order Group by: (optional) Break option SQL STRSQL: Will provide you with a command line screen that you can enter an SQL statement. F4: Will prompt you for information