| 词汇 | 选择性 |
| 释义 | 选择性 Project Justice receives thousands of cases and they have to be selective about what they work on because they have limited help. You have to be selective in your vulnerability, of course. Of course we’ve been over this before but because of his age and his selective memory I revive all the usual arguments: Mechanics take their own cars apart. OneIndian doctor from AIIMS, arguing in favour of sex- selective abortions, concedes that“ this may not be acceptable to persons in the West…” Oh. She also subscribed to a selective amnesia: “ I have the habit of forgetting what I do not care to remember, ” she conceded. Each year, selective colleges promote their application totals, along with the virtues of their applicants. You should also be selective in your query so that the database does not return more rows and columns than you need. However, in the absence of data distribution information, the optimizer will calculate selectivity for filters of different types based on table indexes. This information can then be included as part of the optimizer decision during costing for selectivity and cardinality estimates for qualified queries which do not need to reference the view directly. Then I started being more selective. I realised the optimum situation is to make lots of female friends, then choose the ones you want to sleep with. This can occur if the IN list contains parameter markers or host variables which prevent the optimizer from using catalog statistics to determine the selectivity. If the table in your query are pretty small usually fewer than1,000 rows or clustered tables, and your query is not selective at all, it would be beneficial to use a table scan. Biologists can infer the reason for these selective forces from the kinds of genes that are tagged by the genome scans. Thousands of years of selective breeding have produced extensive genetic changes in the plants and animals we eat, not all of them good. They may want to use selective replication to receive only the records they need. . At the same time, we also have found differences in signal selectivity that may allow us to target some bacteria while ignoring others. Many genes for taste and smell show signs of selective pressure, perhaps reflecting the change in foodstuffs as people moved from nomadic to sedentary existence. But if there are manual regression tests we will have to be selective. Be selective about how you use your time and what you focus on. Sometimes, due to a skew in the distribution of data, the nature of the predicate or the query, or insufficient statistics, the optimizer's selectivity estimates may not be accurate. This test is very selective in what elements it chooses to test for, and the results seem to favor one over the others. Two weeks ago, I talked about the concept of selective perception, how subconsciously we pick and choose what we pay attention to. The president, in his selective amnesia, would have voters believe that everything good about Brazil dates from his election in 2002. |
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