Buen dia a todos,

Estoy tratando de sacar la diferencia de un par de datos de la siguiente
manera:
tengo 3 campos que se llaman horaini, horafin y mtbf, lo que quiere es que
me saque la diferencia entre horaini y horafin y lo asigne a mrbf pero
necesito que el valor de horaini lo tome del row anterior algo como lo
siguiente:

Horaini horafin mtbf
08:30 08:45 XXXX
10:30 11:00 02:00

de antemano muchas gracias por sus ideas

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Saludos compañeros

Uno de los paradigmas que enfrentamos los desarrolladores es poder crear una
aplicacion que funcione con diferentes motores de basos de datos, por
ejemplo, me gustaria hacer una aplicacion que funcione con SQL Server, con
DB2
Express y con Oracle. No se como enfrentar esto, por eso solicito su ayuda:

1- Es viable (lease rentable), mas alla del punto de vista teorico, si no
desde un enfoque basado en la vida real, llevar a cabo un proyecto de ese
tipo?

2- En cuanto a costos, la creacion y posterior mantenimiento de la
aplicaicon implicaria mas costos operativos($$$)

3- Entiendo que seria dificil mantener el mismo store procedure en todas las
bases de datos, sea por temas de sintaxis, sea por aprovechar
caracteristicas particulares de cada base de datos, etc.

4- Por favor comentar cualquier experiencia al respecto o tal vez
bibliografia especializad.

Gracias anticipadas

Javier Lozano
Lima-Peru

Amigos,

como puedo eliminar de un objeto DataTable varias registros que coincidan
con un criterio o lo que seria el similar a hacer un "delete from tabla where
...."

gracias de antemano

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