A data control language

• data manager
• main part of DBMS
• logical view - physical records
• manages resources (creating/deletion of objects, access methods)
• protects integrity (semantic integrity(whether relationships make sense), transaction processing (applies change when a change has completed on all systems), authorization)
• error logging
• perfomance monitoring
• concurrency control
• disaster recovery

source psfile jl@crush.caltech.edu index DBMS