following on from my other post... I have a table that uses two fields to make a primary key... TravelEventIDRemarkNoKeywordText
I am working on a couple of link tables and开发者_如何学运维 I got to thinking (Danger Will Robinson, Danger) what are the possible structures of a link table and what are their pro\'s and con\'s.
I have deleted one row(row 20) in my \"table category\" ,please let me know that how c开发者_如何学编程an i reorder the catid (primary key)? at this time it is 21 after 19.
Could you please opine if having identity 开发者_如何学Ccolumn as primary key is a good practise?
I am working on existing DB and try to optimize it.I see a table without a single primary key but with two foreign keys work as a primary key.I know it will work. however, is it better to have one sin
In my table tbphotos I had a 100 records. I then deleted all the records and now that I want to restart data开发者_如何学JAVA entry I see that my primary key doesn\'t start from 1, but it starts from
In MSSQL is there a way to specify a name for a PK constraint so that MSSQL doesn\'t provide 开发者_如何学编程a randomly generated PK name like so:
I am trying to get a string of length 15 to be used as primary key in database tables. The followi开发者_Python百科ng code in java returns some key with length 35
I haveseveral database tables that just contain a single column and very few rows, often just an ID of something defined in another system. These tables are then referenced with foreign keys from othe
I\'m doing maintenance work on an existing Rails site and am having some problems stemming from many-to-many associations.It looks like the site was initially built using has_and_belongs_to_many for a
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