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When should I use a NoSQL database instead of a relational database? Is it okay to use both on the s
What are the advantages of using NoSQL databases? I've read a lot about them lately, but I'm still unsure why I would want to implement one, and under what circumstances I would want to use one.
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TSQL Pivot without aggregate function
... This should be the accepted answer as it shows the proper use of the TSQL Pivot command.
– Ubercoder
Jan 2 '19 at 15:05
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What is the difference between Left, Right, Outer and Inner Joins?
...imple Example: Lets say you have a Students table, and a Lockers table. In SQL, the first table you specify in a join, Students, is the LEFT table, and the second one, Lockers, is the RIGHT table.
Each student can be assigned to a locker, so there is a LockerNumber column in the Student table. More...
How to get last N records with activerecord?
... Try this with Postgres! I've certainly had trouble with first. In SQL the order isn't guaranteed unless you specify it, but MySQL is more forgiving.
– Ghoti
Jul 15 '12 at 10:56
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What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
...s the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
6 Answers
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乐视全员合伙人制的背后 - 资讯 - 清泛网 - 专注C/C++及内核技术
...要出资购买，这意味着收益接近股份的全价值。
而对于如何在激励计划上兼顾部门利益和部门间的协作，乐视的做法是：无论员工属于业务子公司还是乐视控股，激励的最终价值都将来自于生态价值的整体提升。据了解，具体...
Can I have multiple primary keys in a single table?
...xed columns on the same table). Be sure to consult your specific flavor of SQL's manual for details on the exact language syntax used.
– 4AM
Jan 25 '18 at 17:16
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站长投放广告绝对不做的事:Google Adsense和百度联盟广告违规分析 - 更多技...
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2、“版权材料”就是指在未经版权所有者授权的情况下使用的材料，包括电影，电视剧，电视节目，音乐和歌曲（mp3，铃声，flash），漫画，书籍，软件等。特别要注意了：网站上的版权声明（例如“本站所有内容均搜集与网...
Debug Error \"pure virtual function call\" 原因解析 - 更多技术 - 清泛...
...常而未完全销毁，从而遗留下一个"次品"对象，程序继续使用此次品对象而调用到纯虚函数：
class Base
{
public:
~Base(){throw 0;} // . . . a)
virtual void virtualFunc() = 0;
};
class Derived: public Base
{
public:
virtual void virtualFunc(){}
};
Ba...
Storing money in a decimal column - what precision and scale?
...age. Accountants generally seem to favour four decimal places.
PS Avoid SQL Server's MONEY data type because it has serious issues with accuracy when rounding, among other considerations such as portability etc. See Aaron Bertrand's blog.
Microsoft and language designers chose banker's roundin...