How do I configure the Linux kernel within Buildroot?
And the answer is:
make linux26-menuconfig
What does make oldconfig do exactly in the Linux kernel makefile?
It reads the existing .config
file that was used for an old kernel and prompts the user for options in the current kernel source that are not found in the file. This is useful when taking an existing configuration and moving it to a new kernel.
Trying to determine a specific database normalization issue
If those two columns are really all there are, then I would say this database table is in third normal form. Here's my reasoning:
- It's CLEARLY in 1NF since none of the attributes are "multi-valued"
- Since neither col1 nor col2 are a valid key candidate (duplicate values!), the only possible and valid primary key on this table is (col1,col2)
- 2NF stipulates that no non-prime attribute shall be functionally dependent on a part of a candidate key. Since there are only col1 and col2 which are both part of the only possible candidate key, this point is moot - the table IS in 2NF
- 3NF according to E.F.Codd basically says that any non-key attribute must be dependent "on the key, the whole key, and nothing but the key". Since we ONLY have two columns which make up the key, there are no other non-key attributes, so none of the non-key attributes violates this rule --> the table IS is 3NF
I don't know if your work buddy wants to really get into 4NF, 5NF or Boyce-Codd NF - I highly doubt it......
Marc
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