TINGE
发表于 2025-3-21 18:29:59
书目名称Leveling Up with SQL影响因子(影响力)<br> http://impactfactor.cn/if/?ISSN=BK0585326<br><br> <br><br>书目名称Leveling Up with SQL影响因子(影响力)学科排名<br> http://impactfactor.cn/ifr/?ISSN=BK0585326<br><br> <br><br>书目名称Leveling Up with SQL网络公开度<br> http://impactfactor.cn/at/?ISSN=BK0585326<br><br> <br><br>书目名称Leveling Up with SQL网络公开度学科排名<br> http://impactfactor.cn/atr/?ISSN=BK0585326<br><br> <br><br>书目名称Leveling Up with SQL被引频次<br> http://impactfactor.cn/tc/?ISSN=BK0585326<br><br> <br><br>书目名称Leveling Up with SQL被引频次学科排名<br> http://impactfactor.cn/tcr/?ISSN=BK0585326<br><br> <br><br>书目名称Leveling Up with SQL年度引用<br> http://impactfactor.cn/ii/?ISSN=BK0585326<br><br> <br><br>书目名称Leveling Up with SQL年度引用学科排名<br> http://impactfactor.cn/iir/?ISSN=BK0585326<br><br> <br><br>书目名称Leveling Up with SQL读者反馈<br> http://impactfactor.cn/5y/?ISSN=BK0585326<br><br> <br><br>书目名称Leveling Up with SQL读者反馈学科排名<br> http://impactfactor.cn/5yr/?ISSN=BK0585326<br><br> <br><br>
BARK
发表于 2025-3-21 22:11:39
http://reply.papertrans.cn/59/5854/585326/585326_2.png
Mawkish
发表于 2025-3-22 03:12:39
https://doi.org/10.1007/978-1-4842-9685-1database; PostgreSQL; Oracle; MySQL; MariaDB; SQLite; SQL
落叶剂
发表于 2025-3-22 07:35:32
Getting Ready,If you’re reading this book, you’ll already know some SQL, either through previous study or through bitter experience, or, more likely, a little of both. In the process, there may be a few bits that you’ve missed, or forgotten, or couldn’t see the point.
Ballad
发表于 2025-3-22 10:37:24
Working with Table Design,SQL databases are, or at least should be, built on some pretty strong principles. Although these principles are sometimes relaxed in real life, the database will be more reliable and more efficient if they’re followed as far as possible.
Jogging
发表于 2025-3-22 15:24:40
Table Relationships and Joins,A database is not just one table. Well, it can be of course, but any sophisticated database, such as one which you would use to manage an online bookshop, will comprise a number of tables, each handling a different collection of data.
Jocose
发表于 2025-3-22 19:30:18
Working with Calculated Data,No doubt, you will have seen calculations before now. SQL allows you to include calculated data in your queries.
Comedienne
发表于 2025-3-23 00:17:07
Aggregating Data,Databases store data. That’s obvious, but the data itself is pretty inert—you save it, you retrieve it, and you sometimes change it. That’s OK for some things, but sometimes you want the data to work a little harder.
一起
发表于 2025-3-23 04:42:58
Using Views and Friends,You can spend the rest of your life writing SQL statements, and the job would get done. However, you might get to the point where writing the same thing over and over again loses its charm, and so you’ll want to find ways of reusing previous queries.
填料
发表于 2025-3-23 09:19:21
http://reply.papertrans.cn/59/5854/585326/585326_10.png