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INSERT In between entries of a database table?


diskhub

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  • 2 weeks later...

Don't EVER worry about the UIDs, or the physical order the table -- if you app "needs" to know about this, then there is something seriously wrong with your DB design. Just run your INSERT statements, and let the storage engine do the rest.

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Can you explain why you would want to do this?

 

Typically, this defeats the purpose of id's at all.

 

I'll show you:

 

Let's say you have a table 'animals'

 

0,cat

1,dog

2,rhino

 

you have another table 'pet owners'

 

tim,0 (cat)

tim,1 (dog)

shelly,2 (rhino)

 

Then you insert an animal into database after cat, lemur!

 

0,cat

1,lemur

2,dog

3,rhino

 

Now tim owns a cat and a lemur and shelley owns a dog!

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