Thanks all, In fact I am using sync framework that did not allow me to use "auto-increment". that the reason way I have to make it remotely. in the end I will choice BIGINT because that will let me use less conversion.

Thanks all, In fact I am using sync framework that did not allow me to use "auto-increment". that the reason way I have to make it remotely. in the end I will choice BIGINT because that will let me use less conversion.

thanks, that is right in general cases. in fact I am using sync framework that did not allow me to use "auto-increment". that the reason way I have to make it remotely . also dude I am using "fffff" micro seconds for real what the possibility to generate the same value at the same time?? @Phill W