records

I'm developing a php / mysql application that handles multiple simultaneous users. I'm thinking of the best approach to take when it comes to locking / warning against records that are currently being viewed / edited. The scenario to avoid is two users viewing the record, one making a change, then the other doing likewise - with the potential that one change might overwrite the previous. In the latest versions of WordPress they use some method to detect this, but it does not seem wholly reliable - often returning false positives, at least in my experience. I assume some form of ajax must be in

some questions about records in Delphi: As records are almost like classes, why not use only classes instead of records? In theory, memory is allocated for a record when it is declared by a variable; but, and how is memory released after? I can understand the utility of pointers to records into a list object, but with Generics Containers ( TList<T> ), are there need to use pointer yet? if not, how to delete/release each record into a Generic Container? If I wanna delete a specific record into a Generic Container, how to do it? For 1 and 2: records are value types, while classes are reference

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center . I have a table with 158 columns and 22,000 rows and I have another empty table where I want insert values dynamically based on the WHERE condition coming from the user. The SELECT query will look something like this: SELECT * FROM mygrist_tables WHERE suic_att>=5 AND gender='M' This gives me about 9,000 records back (say). I want to

Something I've wondered for a long time: why aren't Delphi records able to have inheritance (and thus all other important OOP features)? This would essentially make records the stack-allocated version of classes, just like C++ classes, and would render "objects" (note: not instances) obsolete. I don't see anything problematic with it. This would also be a good opportunity to implement forward declarations for records (which I'm still baffled as to why it's still missing). Do you see any problems with this? Relevant to this question, there are two kinds of inheritance: interface inheritance and

What I want to do: What I want to do is that I have a big .csv file. I want to break down this big csv file into many small files based on the common records in BB column that alos contain 1 in the HH column, and all uncommon records that contain 0 in HH column. As a result, all files will contain common records in BB column that contain 1 in the HH column, and all uncommon records that has no records in BB column and contain 0 in the HH column. The file name should be based on the common record of column 2 (BB). Please take a look below for the scenarion. Any suggestion idea is appreciated

I am trying to extract only records that contain the field "movie" from MySql Android database. My code looks like this: Class Name:MediaDbAdapter Database table name: records column name:KEY_TYPE mDb.query(records, new String[] {MediaDbAdapter.KEY_TYPE}, "KEY_TYPE = " + "'movie'", null, null, null, null); Just not working.... mDb.query(records, new String[] {"KEY_TYPE"}, "KEY_TYPE = 'movie'", null, null, null, null); try this db.query(TABLE_NAME, new String[] {"KEY_TYPE"}, "KEY_TYPE = " + "'movie'", null, null, null, null); 来源： https://stackoverflow.com/questions/7162374/trying-to-extract