引入 1.什么是 pymysql **pymysql **是 Python 中用来操作 mysql 的第三方模块(库)(就是一个mysql的客户端)pymysql 是 Python3 之后出来的模块, 而 Python2 中使用 mysqldb 操作数据库Django 中也可以使用 pymysql 连接 mysql 数据库 2.pymysql 的安装 终端命令行 pip3 install pymysql # 或者使用下面的方式 pip3 install -i http://pypi.douban.com/simple/ pymysql # 豆瓣源 pip3 install -i https://pypi.tuna.tsinghua.edu.c...
导出表格到xls文件，报错： mysql> select count(*) into outfile /tmp/people.xls from fp_people; ERROR 1290 (HY000): The MySQL server is running with the --secure-file-priv option so it cannot execute this statement 查看--secure-file-priv的值，--secure-file-priv值的默认目录是 /var/lib/mysql-files/ mysql> show variables like %secure%; +--------------------------+-----------------------+ | Variable_nam...
我正在使用PMA测试一些数据透视查询(动态列),但是一切似乎都正常,但是,我只在结果中得到#行,而不是实际的行集. 如何查看结果集？SET @sql = NULL; SELECTGROUP_CONCAT(DISTINCTCONCAT('MAX(IF(t.week_end = ''',t1.week_end,''', t.st_hours, NULL)) AS ''',t1.week_end, '\'')) INTO @sql FROM timesheets t1 WHERE t1.week_end > "2015-03-01";SET @sql = CONCAT('SELECT t.assignment_id, ', @sql, ' FROM timesheets tLEFT JOI...
我有一张桌子,我正在阅读它的n％记录.为此,我准备了一个查询：SET @rows := (SELECT COUNT(*)*0.5 FROM trending); PREPARE STMT FROM 'SELECT * FROM trending ORDER BY Count LIMIT ?'; EXECUTE STMT USING @rows;我得到的输出是：SET @rows := (SELECT COUNT(*)*0.5 FROM trending);# MySQL returned an empty result set (i.e. zero rows). PREPARE STMT FROM 'SELECT * FROM trending ORDER BY Count LIMIT ?';# MySQL retur...
我们尝试将包含多个插入语句的SQL文件作为单个查询运行,但是当任何语句包含错误时,似乎回滚失败. MySQLd配置：sql_mode = STRICT_ALL_TABLES default-storage-engine = innodbPython代码：from contextlib import closing import MySQLdb database_connection = MySQLdb.connect(host="127.0.0.1", user="root") with closing(database_connection.cursor()) as cursor:database_connection.begin()cursor.execute('DROP DATABASE ...
MySQL报错：The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement等问题 1.登录的mysql：mysql –u root –p mysql> set global read_only=0;（关掉新主库的只读属性） flush privileges; 2.修改mysql配置文件my.cnf，该文件在/etc目录下重启mysql服务：service mysqld restart
mysql:使用存储过程报错 User does not have access to metadata required to determine stored procedure parameter types. If rights can not be granted, configure connection with “noAccessToProcedureBodies=true” to have driver generate parameters that represent INOUT strings irregardless of actual parameter types. 需要授予用户权限： GRANT SELECT ON mysql.proc TO ‘dock’@’%’; GRANT EXECUTE ON db_doc...
我在我安装的MySQL版本上关注这个tutorial,但它给我一个错误：SET @sql = NULL; SELECTGROUP_CONCAT(DISTINCTCONCAT('MAX(IF(property_name = ''',property_name,''', value, NULL)) AS ',property_name)) INTO @sql FROMproperties; SET @sql = CONCAT('SELECT item_id, ', @sql, ' FROM properties GROUP BY item_id');PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;我在phpMyAdmin的SQL编辑器上粘贴它. 我听从...
import pymysqlmysql_host = 192.168.0.106 port = 3306 mysql_user = root mysql_pwd = 123 encoding = utf8# 建立 连接mysql服务端conn = pymysql.connect(host=mysql_host, # mysql服务端ipport=port, # mysql端口user=mysql_user, # mysql 账号password=mysql_pwd, # mysql服务端密码db=db10, # 操作的库charset=encoding # 读取字符串编码)# 拿到游标对象 cur = conn.cursor() 游标是给mysql提交命令的接口 mysql> 把s...