sir i want to join another company but one company...

Although your question is not clear, here is the following information:
The employer can submit an application for a worker's visa to the General Directorate of Residence
And the Ministry of Human Resources and Emiratisation.
Among the documents required to obtain a visa:
Worker's passport.
Employer's passport.
- job contract .
- Medical examination .
A certificate that no criminal judgments have been issued against the worker (certificate of good conduct).
Documents of the sponsor company.
finally,,
You cannot transfer from one company to another until the previous employment contract has been legally terminated.