Initially, he joined forces with his brother, Juan Záizar, with whom he formed a duo.
Prior to this, they had both been working on individual projects, especially Juan, who was a renowned composer and singer.
They had only sung together for very special occasions, like their tribute to honor the famous ranchera composer, also from Jalisco, Pepe Guízar.
Like most Mexican folk songs, the majority of those interpreted by David that we have left today are about lost loves, unfaithful women, Mexico and its people, and several other topics commonly present throughout ranchera music.
In addition to his own recordings, many of his songs have been recorded successfully by renowned recording artists from around the Spanish-speaking world, most notably Miguel Aceves Mejía, Pedro Infante, Rocío Dúrcal, Javier Solís, Pedro Fernández, Jorge Negrete, José Alfredo Jiménez, Vikki Carr, Luis Miguel, Lola Beltrán, Alejandro Fernández, Chavela Vargas, Maná, Antonio Aguilar, Vicente Fernández, Julio Iglesias, Joaquín Sabina, Manolo García, Los Tigres del Norte, and Gualberto Castro.