text: from django.db.models.sql import compiler
  
  
  class SQLCompiler(compiler.SQLCompiler):
      def as_subquery_condition(self, alias, columns, compiler):
          qn = compiler.quote_name_unless_alias
          qn2 = self.connection.ops.quote_name
          sql, params = self.as_sql()
          return '(%s) IN (%s)' % (', '.join('%s.%s' % (qn(alias), qn2(column)) for column in columns), sql), params
  
  
  class SQLInsertCompiler(compiler.SQLInsertCompiler, SQLCompiler):
      pass
  
  
  class SQLDeleteCompiler(compiler.SQLDeleteCompiler, SQLCompiler):
      def as_sql(self):
          if self.single_alias:
              return super().as_sql()
          # MySQL and MariaDB < 10.3.2 doesn't support deletion with a subquery
          # which is what the default implementation of SQLDeleteCompiler uses
          # when multiple tables are involved. Use the MySQL/MariaDB specific
          # DELETE table FROM table syntax instead to avoid performing the
          # operation in two queries.
          result = [
              'DELETE %s FROM' % self.quote_name_unless_alias(
                  self.query.get_initial_alias()
              )
          ]
          from_sql, from_params = self.get_from_clause()
          result.extend(from_sql)
          where, params = self.compile(self.query.where)
          if where:
              result.append('WHERE %s' % where)
          return ' '.join(result), tuple(from_params) + tuple(params)
  
  
  class SQLUpdateCompiler(compiler.SQLUpdateCompiler, SQLCompiler):
      pass
  
  
  class SQLAggregateCompiler(compiler.SQLAggregateCompiler, SQLCompiler):
      pass
  