Python使用sql语句对mysql数据库多条件模糊查询的思路详解

def find_worldByName(c_name,continent):
    print(c_name)
    print(continent)
    sql = " SELECT * FROM world WHERE  1=1 "
    if(c_name!=None):
        sql=sql+"AND ( c_name LIKE '%"+c_name+"%' )"
    if(continent!=None):
        sql=sql+" AND ( continent LIKE '%"+continent+"%') "
    sql=sql+" AND dt=(SELECT dt FROM world order by dt desc limit 1) order by confirm desc "

          # "AND continent LIKE '%%%%%s%%%%'" \
          # " order by dt desc " %(c_name,continent)
    # sql_temp = " SELECT * FROM world WHERE c_name LIKE '%"+c_name+"%' "
    res = query(sql)
    list= []
    for i in res:
        # print(i)
        list.append(i)
    return list;

sql = " SELECT * FROM world WHERE 1=1 "

if(c_name!=None):
          sql=sql+"AND ( c_name LIKE '%"+c_name+"%' )"
      if(continent!=None):
          sql=sql+" AND ( continent LIKE '%"+continent+"%') "
      sql=sql+" AND dt=(SELECT dt FROM world order by dt desc limit 1) order by confirm desc "

var c_name="test"
sql_temp = " SELECT * FROM world WHERE c_name LIKE ' %"+c_name+"% '"

sql = " SELECT * FROM world WHERE c_name LIKE '%%%%%s%%%%' AND continent LIKE '%%%%%s%%%%'" %(c_name,continent)