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visits member for 2 years, 8 months
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Oct
11
revised Very slow response even with a high number of available connections
formatting, grammar, punctuation
Oct
11
suggested suggested edit on Very slow response even with a high number of available connections
Oct
6
comment How to add a default null row if no results from the dynamic pivot query
@user48768: By your original query I meant the one you want (and have been trying) to append an empty row to. That is, the entire PIVOT query would be the your query in the above suggestion.
Oct
6
answered How to add a default null row if no results from the dynamic pivot query
Oct
4
comment When you type an SQL query in interpreter, what does happen?
No, I didn't have issues with the missing comma (but thanks for it nonetheless). As I see it, the problem is the placing of the closing bracket: in my opinion, the bracketed expression should read (in SQL Server and other database engines).
Oct
3
comment When you type an SQL query in interpreter, what does happen?
However the four key stages (…) and other database engines are… – hm, this doesn't seem to make much sense. Perhaps the and other database engines should be in the brackets too.
Sep
30
awarded  Explainer
Sep
25
revised Truncated 200GB table but disk space not released
fixed typos
Sep
25
suggested suggested edit on Truncated 200GB table but disk space not released
Sep
24
comment Alternatives for a LEFT OUTER JOIN query
It seems there is (or was) a bug with outer joins, specifically with right outer joins, in H2 according to information on this page. Note that apart from the fact that the issue was not with left outer joins, it also says there the bug was fixed in version 1.3, and, based on this, the latest version appears to be 1.4. Now, you said earlier that H2 was your choice. Did you happen to choose to use an old version of it?
Sep
19
awarded  Nice Answer
Sep
19
comment Relational Model vs. Database Products
@ThomasKejser: Well, this answer basically boils down to "When you come from theory (relational model) to practice (SQL, RDBMS), don't expect magic". That can be said about virtually any implementation of anything. In any event, is that a good answer to "Other than terminology (relation vs. table, attribute vs. column, tuple vs. row), what are some of the major differences?"?
Sep
18
answered Sum of two columns from pivot
Sep
18
comment Relational Model vs. Database Products
I think I can see your point now but I also disagree with what you call a difference (or even "the greatest difference"). I think the OP is looking for differences they will be able to observe (like something that one side has and the other doesn't: SQL has NULLs, RM has relational division…), and the fact that RDBMSes are iterative internally is not really observable by the user. On the other hand, it may explain existing differences, so probably you've answered some part of the question.
Sep
18
comment Relational Model vs. Database Products
What is the point of saying that no-one can operate "real sets" (whatever you may mean by those)? I don't think that's what the OP is after. As far as I can see, the question is merely about differences from the perspective of a user of an RDBMS (rather than a human being in general). As a user of an RDBMS, you work with data-sets using set operations provided by the system.
Sep
16
comment sql server date issue
There may be no need to post the entire query. What could be more useful is the type of the dob column, where you are executing the query and consuming the results, and possibly the locale settings of the system where you are executing the query as well.
Sep
16
comment sql server date issue
If dob is a date or datetime, SET LANGUAGE will have no impact on how the column is displayed unless you do CAST(dob AS varchar(…)). If it's a varchar already, SET LANGUAGE will have no impact either. Therefore, SET LANGUAGE alone won't help here.
Sep
10
revised Database Design for Preserving Values and Additional columns
added paragraphs for readability, minor spelling and punctuation corrections
Sep
10
suggested suggested edit on Database Design for Preserving Values and Additional columns
Aug
21
revised average record hourly
edited body