Man pages matching name isql-vt in section 1:

ISQL-VT.1.en	debian 10 / virtuoso-opensource-6.1-bin
isql-vt.1.en	debian 10 / virtuoso-opensource-6.1-bin
ISQL-VT.1.en	debian 11 / virtuoso-opensource-7-bin
isql-vt.1.en	debian 11 / virtuoso-opensource-7-bin
ISQL-VT.1.en	debian 12 / virtuoso-opensource-7-bin
isql-vt.1.en	debian 12 / virtuoso-opensource-7-bin