ref 非唯一性索引扫描,返回匹配某个单独值的所有行,本也是一种索引访问,它返回所有匹配某个单独值的行,它可能会找到多个符合条件的行,所以他应该属于查找和扫描的混合体。 range 只检索给定范围的行,使用一个索引来选择行,key列显示使用了哪个索引,一般就是在你的where语句中出现between、< 、>、in等的查询,这种...
a你好啊 很高兴认识你啊 You good know you very happily[translate] astate the domain and range of each relation.Then state whether the relation is a function. write yes or no.Explain 陈述每联系的领域和范围。然后状态联系是否是作用。 写得是或否。解释[translate]...
百度试题 结果1 题目【题目】State the domain and range of the following functions andexplain what your answers mean in terms of evaluatingthe functions.f(x)=sin^(-1)x 相关知识点: 试题来源: 解析 【解析】-1≤x≤1;-x/2≤f(x)≤x/2 ...
Realizes the science development in the expense domain to have to carry out the scientific attitude toward consumption, promotes by the sustainable expense to produce sustainably, finally realizes the science development. [translate] a《勇敢的心》这部电影英国的民族解放战争为背景,讲述了苏格兰民族英雄...
(3)DOMAIN INDEX:应用域索引。 3、位图索引操作 (1)BITMAP CONVERSION:将位转换为ROWID或相反。 INDEX:从位图中撮一个值或一个范围的值。 MERGE:合并位图。 MINUS:从一个位图减去另一个位图。 OR:对两个位图进行OR操作。 4、表连接操作 (1)CONNECT BY:对前一个步骤的输出结果执行一个层次化的自连接操作。
This statement also determines the cost of executing the statement. If any domain indexes are defined on the table, then user-defined CPU and I/O costs will also be inserted. The definition of a sample output tablePLAN_TABLEis available in a SQL script on your distribution media. Your outpu...
dihydrolipoyllysine-residue acetyltransferase;F3 gt, anthocyanidin 3-O-glucosyltransferase;F5 h, ferulate-5-hydroxylase;Fls, flavonol synthase;Hcar, 7-hydroxymethyl chlorophyll a reductase;Hk, hexokinase;Idh, isocitrate dehydrogenase;Jaz, jasmonate ZIM domain-containing protein;Mdh, malate dehydrogenase;Msp,...
Hp2 ends rostrally at the acroterminal rostromedian domain (green), stretched between the rostral roof and rostral floor, which displays unique formations such as the alar preoptic lamina terminalis and the optic chiasma, and the basal infundibular tuberal region with the neurohypophysis. The ...
Credit: Pixabay/CC0 Public Domain With kids returning to school and many adults heading back to the office or traveling, something as simple as a cough or runny nose might lead to panic—and the need for a COVID-19 test. But because of the wide availability of COVID-19 vaccines, the ...
> SYSDATE-30AND l.header_id = h.header_id ;Plan---SELECT STATEMENTNESTED LOOPSTABLE ACCESS BY INDEX ROWID SO_HEADERS_ALLINDEX RANGE SCAN SO_HEADERS_N1TABLE ACCESS BY INDEX ROWID SO_LINES_ALLINDEX RANGE SCAN SO_LINES_N1 This plan shows execution of aSELECTstatement. Indexso_headers_n1is...