CREATE TABLE sqlite_master ( 
type TEXT, 
name TEXT, 
tbl_name TEXT, 
rootpage INTEGER, 
sql TEXT 
); 

SELECT * FROM sqlite_master WHERE type='table';

PRAGMA table_info(表名);
示例：
PRAGMA table_info(sqlite_sequence);

class DBOperate(object):
  """
  數(shù)據(jù)庫(kù)操作類
  """
  def __init__(self, db_file_path):
    # 連接 sqlite db
    # 關(guān)于commit()，如果isolation_level隔離級(jí)別默認(rèn)，那么每次對(duì)數(shù)據(jù)庫(kù)的操作，都需要使用該命令，
    # 設(shè)置 isolation_level=None，變?yōu)樽詣?dòng)提交模式
    self._db_file_path = db_file_path
    self.conn = sqlite3.connect(self._db_file_path, check_same_thread=False, isolation_level=None, timeout=1000)
    # 創(chuàng)建游標(biāo)
    self.cur = self.conn.cursor()

  def queryall(self, sql):
    """
    查詢所有的數(shù)據(jù)及對(duì)應(yīng)的列名
    :param sql:
    :return:
    """
    self.cur.execute(sql)
    # TODO 獲取查詢結(jié)果的列名
    columns_tuple = self.cur.description
    # columns_tuple示例： (('TACHE_NAME', None, None, None, None, None, None), ('avgtime', None, None, None, None, None, None), ('DATE', None, None, None, None, None, None), ('ANALYSIS_TIME', None, None, None, None, None, None))
    columns_list = [field_tuple[0] for field_tuple in columns_tuple]
    # TODO 獲取查詢結(jié)果
    query_result = self.cur.fetchall()
    self.cur.close()
    return query_result, columns_list

  def close(self):
    """
    關(guān)閉數(shù)據(jù)庫(kù)連接
    :return:
    """
    if self.cur is not None:
      self.cur.close()
    if self.conn is not None:
      self.conn.close()