Buchanan 发表于 2025-3-21 18:44:34

书目名称Database Design and Relational Theory影响因子(影响力)<br>        http://figure.impactfactor.cn/if/?ISSN=BK0263353<br><br>        <br><br>书目名称Database Design and Relational Theory影响因子(影响力)学科排名<br>        http://figure.impactfactor.cn/ifr/?ISSN=BK0263353<br><br>        <br><br>书目名称Database Design and Relational Theory网络公开度<br>        http://figure.impactfactor.cn/at/?ISSN=BK0263353<br><br>        <br><br>书目名称Database Design and Relational Theory网络公开度学科排名<br>        http://figure.impactfactor.cn/atr/?ISSN=BK0263353<br><br>        <br><br>书目名称Database Design and Relational Theory被引频次<br>        http://figure.impactfactor.cn/tc/?ISSN=BK0263353<br><br>        <br><br>书目名称Database Design and Relational Theory被引频次学科排名<br>        http://figure.impactfactor.cn/tcr/?ISSN=BK0263353<br><br>        <br><br>书目名称Database Design and Relational Theory年度引用<br>        http://figure.impactfactor.cn/ii/?ISSN=BK0263353<br><br>        <br><br>书目名称Database Design and Relational Theory年度引用学科排名<br>        http://figure.impactfactor.cn/iir/?ISSN=BK0263353<br><br>        <br><br>书目名称Database Design and Relational Theory读者反馈<br>        http://figure.impactfactor.cn/5y/?ISSN=BK0263353<br><br>        <br><br>书目名称Database Design and Relational Theory读者反馈学科排名<br>        http://figure.impactfactor.cn/5yr/?ISSN=BK0263353<br><br>        <br><br>

perpetual 发表于 2025-3-21 23:54:09

Preserving FDs {SNO}, . as {STATUS}, and . as {SNAME,CITY}, Heath’s Theorem tells us we can decompose that relvar into relvars SNC and ST, where SNC has heading {SNO,SNAME,CITY} and ST has heading {SNO,STATUS}. Sample values for SNC and ST corresponding to the value shown for S in Figure 3-1 are shown in Figure 6-1:

micronutrients 发表于 2025-3-22 04:22:10

http://reply.papertrans.cn/27/2634/263353/263353_3.png

过剩 发表于 2025-3-22 08:02:13

http://reply.papertrans.cn/27/2634/263353/263353_4.png

VICT 发表于 2025-3-22 10:13:58

http://reply.papertrans.cn/27/2634/263353/263353_5.png

玩忽职守 发表于 2025-3-22 16:47:57

http://reply.papertrans.cn/27/2634/263353/263353_6.png

玩忽职守 发表于 2025-3-22 18:01:10

Thinking About Justice and Interpreting the s for the small amount of repetition involved). As you’ll quickly see, the treatment in this chapter is rather more abstract than that in the previous one; it shouldn’t be too difficult to follow, if you’re fully comfortable with the material of that previous chapter, but it’ll certainly be more for

丧失 发表于 2025-3-23 00:38:18

https://doi.org/10.1007/978-981-99-5471-1 {SNO}, . as {STATUS}, and . as {SNAME,CITY}, Heath’s Theorem tells us we can decompose that relvar into relvars SNC and ST, where SNC has heading {SNO,SNAME,CITY} and ST has heading {SNO,STATUS}. Sample values for SNC and ST corresponding to the value shown for S in Figure 3-1 are shown in Figure 6

不透明 发表于 2025-3-23 05:27:27

http://reply.papertrans.cn/27/2634/263353/263353_9.png

食物 发表于 2025-3-23 08:01:49

Social Organizations and Governments); as noted in Chapter ., in fact, 5NF is . normal form with respect to JDs, just as BCNF is . normal form with respect to FDs. And the treatment of these ideas in this part of the book therefore parallels the treatment of BCNF and FDs in Part II. In other words, I plan to treat the material both f
页: [1] 2 3 4 5 6
查看完整版本: Titlebook: Database Design and Relational Theory; Normal Forms and All C. J. Date Book 2019Latest edition C. J. Date 2019 Database Design.Functional D