Imports of 470 command

PathSynopsis
database/sqlPackage sql provides a generic interface around SQL (or SQL-like) databases.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/ClickHouse/clickhouse-go/v2
github.com/ClickHouse/clickhouse-go/v2/tests/std
logPackage log implements a simple logging package.
reflectPackage reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types.