Column return the mapped column mapping name in entity type of v and specified Go struct field name.

Columns return all found column mappings in entity type of v.

ExecTx uses annonymous execution function to achieve crash-safe and implicit transaction commission effect Usage example err := ExecTx(context.Background(), s.Db, &sql.TxOptions{}, func(ctx context.Context, accessor *Accessor) error { var p struct { FirstName string `db:"first_name"` LastName string `db:"last_name"` Email string `db:"email"` AddedAt time.Time `db:"added_at"` } err := accessor.Get(context.Background(), &p, "select * from person where first_name=? and last_name=?", "foo", "test") return nil }) */.