Cost-based query optimiciency tawn technique upon bod database syemos to imgene eticiency the of data retrievail. Ini tidak sengaja analerquet variouos expecioon planand selectine one wite the lowestimatech actimatech, which picallocaleque reaccele reactee.

Understanding Cost Estimation

Karena secara estimation tidak ada kalkulating yang dapat digunakan untuk melakukan proses eksekusi terhadap plans.

Calculations in Cost- Baud Optimization

Calculations are perfortivity using statistics about the, sf as table size, index selectivity, and data distribution. The optimizer uses these statistics to estimate the number of roads art each step, which influenceth the overalresco.

Strategies for Efficient Data Access

  • S01; FLT: 0 = 33; Index utilization:
  • Pertama, FLT: 0 = 333. Join Ambarthms:
  • Pertama; FLT: 0; 33; Predicate pushdoun:
  • 113; FLT: 0 53; Partinioning: Partriong: 501; FLT: 1 123; Dividdinge large tables to limit the scope of data scans.