Evaluate $\int_{-\infty}^\infty e^{i(\omega-\omega_0)t}\mathrm\;{dt}$

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Evaluate $$\int_{-\infty}^\infty e^{i(\omega-\omega_0)t}\mathrm\;{dt}$$

This is an integration from a textbook chapter discussing wave involving Fourier transform, which try to deal with dispersion. How to solve this integral? Thanks for any help.