ansi-sql

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How to write these two queries for a simple data warehouse, using ANSI SQL?

I am writing a simple data warehouse that will allow me to query the table to observe periodic (say weekly) changes in data, as well as changes in the change of the data (e.g. week to week change in t[详细]

2023-01-01 14:51 分类：问答
Why do I need to explicitly specify all columns in a SQL "GROUP BY" clause - why not "GROUP BY *"?

This has always bothered me - why does the GROUP BY clause in a SQL statement require that I include all non-aggregate columns? These columns should be included by default - a kind of \"GROUP BY *\" -[详细]

2022-12-29 21:17 分类：问答
《幸福就好 (《我租了一个情人》电视剧片尾曲)》MP3歌词-苏盈之？

幸福就好 (《我租了一个情人》电视剧片尾曲) 苏盈之开发者_运维问答专辑：幸福就好[详细]

2022-12-28 21:02 分类：问答
Early (or re-ordered) re-use of derived columns in a query - is this valid ANSI SQL?

Is this valid ANSI SQL?: SELECT 1 AS X ,2 * X AS Y ,3 * Y AS Z Because Teradata (12) can do this, as well as this (yes, crazy isn\'t it):[详细]

2022-12-23 07:18 分类：问答
SELECT any FROM system

Can any of these queries be done in SQL? SELECT dates FROM system WHERE dates > \'January 5, 2010\' AND dates < \'January 30, 2010\'[详细]

2022-12-21 03:40 分类：问答
Delete all entries in a MxN relation with non-null FK constraints

I have two entities A and B that are related in a MxN relation through an intermediary table, thus making a total of three tables. My relation table R h开发者_如何学Cas non-nullable FK constraints on[详细]

2022-12-19 14:36 分类：问答
暴雪发放《魔兽世界》十周年邀请 11月16日举办？

近日，暴雪娱乐与网易联合宣布，《魔兽世界》第五次资料片将于2014年11月18日在中国大陆上线。为了庆祝魔兽世界6.0大版本更新，暴雪娱乐和网易将于2014年11月16日在北京举行线上庆祝活动。邀请函已经发给了一些媒体[详细]

2022-12-17 11:48 分类：问答
放飞蜻蜓作者是谁啊？？

qq95162547 开发者_运维问答 2022-06-15 00:51 作者：佚名课文并没有提及。《放飞蜻是一篇充满情趣的故事，讲述教育家陶行知见一群孩子在捉蜻蜓，就因势利导育孩子懂得蜻蜓是人类的好朋友，并放飞蜻蜓的故事，教[详细]

2022-12-17 08:51 分类：问答
Someway to do `where booleanvalue=false` on both Sql Server and PostgreSQL?

I am attempting to make an application capab开发者_如何学Cle of running on both Sql Server and PostgreSQL.[详细]

2022-12-14 12:35 分类：问答
Writing SQL query for bids

How can I write a query for this? I\'m not an expert to write this much of complex queries in SQL. I for开发者_StackOverflow中文版got to mention bid 3, 4 here. Based on David\'s query, eliminating d[详细]

2022-12-13 16:00 分类：问答