Is it safe to leave a 32GB SD memory card in a Sony Digital Camera?

Aaaah, thank you for the correction noci.  I was forgetting about the FAT file system.

I'm missing something here about the issue of the SD card wearing out in the camera.  The original question was about leaving the card in the camera.  It seems to me that the same amount of writing to the card will happen whether or not it's removed between uses in the camera.  The camera will only write to the card if a picture is taken.  That's not going to happen if the card isn't in the camera.

What am I missing from the original question?

@Compprobsolv: Best is to leave the card inside...
BILLDL had a good explanation where There was a also a mentions of 10000 - 100000 writes to the card.. (it it are that many).
SD cards have no wear leveling. Writes (or rather erases) go in 1MB chunks, so the first 1MB of a SD card is hit with every picture taken due to use of the FAT filesystem... So cards wear out quite faster then lots of people expect due to writes.

"10000 - 100000 writes to the card "
I agree that this could be an issue but don't see the relevance to the question at hand.  The number of writes doesn't change if you remove the card when not taking pictures.

BILLDL's description was almost complete... It dit explains the physical damage due to stresses.. and also mentioned that there is a LOT of updates avalable  in SD cards.... That is TRUE if all cells are written in the same rate.  The ammendment to that is that there in reality are a LOT less actual updates because the filesystem in question has a HOTSPOT when used as storage device: the FAT TABLE which is written at least once for each file probably a few times for each file written.
As stateted in all messages on the subject of SD card updates.... Example check the internet for reports of SD cards getting killed in RPI's...And yes RPI's are not photoequipment in the most cases, but do use SD cards heavily.

@CompProbSolv

My answer WAS relevant to the question which simply questioned whether any harm could be caused to EITHER the camera OR the SD card if the card was left in the camera (assumed to mean rather than being repeatedly removed and reinserted).  Are you now the self-appointed answer police?

@BillDL
No, I'm not any sort of "police" here.  I was (and still am) lost about how the number of writes to a camera's SD card changes if the card is left in the camera between times when pictures are taken.  I was hoping to get educated on what I'm missing.

I agree that there is the potential for damage to the card or to the camera by repeated removal and insertion of the card.  For that reason, I didn't call that part into question.

Without meaning to insult or patronise George Martin in any way whatsoever, clearly he isn't very technically informed about how a digital camera interfaces with its removable storage, hence his question.  His question might seem simplistic to us "experts", but you either know such things or you don't.  I hoped, by way of offering a fuller explanation, to allay his fears about the camera somehow wearing out or damaging the storage card, or the card somehow causing issues with the camera if left in it.  I was more or less preempting whatever might be causing him worry.  I assume that George will either ask questions if he doesn't understand what I was talking about or why I mentioned what I did, or else he will make the personal decision to dismiss it as insignificant, irrelevant, or off-topic.

i make a point of copying my whole data  from my camera to my desktop as backup.
and i have 2 data cards  - so i swap them then also

Thank you, everyone, for taking the time to fully answer my question through the provision of technical analysis.  Knowing what goes on behind the scenes whenever data is written or deleted on an SD card was most helpful in gaining a clearer picture of how it is treated by the digital camera whenever a picture is taken.  It is definitely good knowing that SD storage devices do not have internal moving parts, unlike the old IDE storage devices which could easily damage from sudden movements, bumps, or jars, thus, resulting in corrupted data.  

On a side note, thank you, Jackie Man, for the tip regarding the proper insertion and removal of the SD memory card.  I will certainly keep in mind to not insert or remove the SD memory card while the camera is on.  

Thanks again, everyone, for taking the time to thoroughly address my question.  I certainly am walking away from this post knowing much more now.

George

Thank you George.  Glad to help.