Method From

update.go:247–249

From adds FROM clause to the query FROM is valid construct in postgresql only.

(from string)

// From adds FROM clause to the query
// FROM is valid construct in postgresql only.
func (b UpdateBuilder) From(from string) UpdateBuilder {
	return builder.Set(b, "From", newPart(from)).(UpdateBuilder)
}

// FromSelect sets a subquery into the FROM clause of the query.
func (b UpdateBuilder) FromSelect(from SelectBuilder, alias string) UpdateBuilder {