Bitmap indexes are best suited for columns with;()
A: High selectivity
B: Low selectivity
C: High inserts
D: high updates
A: High selectivity
B: Low selectivity
C: High inserts
D: high updates
举一反三
- The aphotic zone (bottom of the ocean) will have ____ and ____ while the photic zone (surface of the ocean) will have ____ and ____. A: low temperature, low salinity; high temperature, high salinity B: low temperature, high salinity; high temperature, low salinity C: high temperature, high salinity; low temperature, low salinity D: high temperature, low salinity; low temperature, high salinity E: both have equal temperature and salinity
- ENUM类型的字段level定义为（LOW、MIDDLE、HIGH），ORDER BY level asc的顺序是 A: HIGH、LOW、MIDDLE B: LOW、MIDDLE、HIGH C: MIDDLE、LOW、HIGH D: HIGH、MIDDLE、LOW
- Air tends to flow from a _______ pressure area to a _______ pressure. A: high, lower B: low, higher C: high, high D: low, low
- 黄璐同学在示范课中所展示的音域为？ A: low C～high c B: low E～high c C: low C~high e D: low D～high c
- Depression has the epidemiological characteristics of“Three High”and “One Low”, namely ( ) and low recovery rate. A: High Incidence B: High recurrence rate C: High suicide rate D: High rate of teratogenesis