give me the SQL code for this model

Student \begin{tabular}{|l|l|l|l|l|l|l|l|l|l|l|l|l|l|} \hline Studentnumber & NationalIDno. & Phone & Birthdate & Male & Female & Firstn & Lastn & City & Streetno. & Postalcode & Level & \( \begin{array}{l}\text { Major } \\ \text { _dep }\end{array} \) & Depcode \\ \hline Join \\ Student number \\ \hline \end{tabular} College \[ \begin{array}{|l|l|l|l|l|l|l} \hline \text { Dep-code } & \text { name } & \text { Phones } & \text { Teacher_id } & \text { College_no. } \\ \hline \end{array} \] Dep_phones \begin{tabular}{|l|l|} \hline Dep code & Phones \\ \hline \end{tabular} Teacher \begin{tabular}{l} \begin{tabular}{|l|l|l|l|l|} \hline Teacher ID & First n & Last n & salary & Email \\ Teach & \multicolumn{3}{l}{} \\ \hline Teacher ID & Course no. \\ \hline \end{tabular} \\ \hline \end{tabular}