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AI问答 function asd(){ var xhr = new XMLHttpRequest(); xhr.open("GET","stock.json",true); xhr.send(); xhr.onload = function() { if (xhr.status === 200){ var data = JSON.parse(xhr.response); data = data.filter(function(item){ return item[1]; }); document.getElementById('aa').innerHTML=data; } }; } asd();代码中为什么是输出全部数据了 0 2023-11-01

AI问答 function asd(){ var xhr = new XMLHttpRequest(); xhr.open("GET","stock.json",true); xhr.send(); xhr.onload = function() { if (xhr.status === 200){ var data = JSON.parse(xhr.response); data.forEach(function(item,index,array){ data = item[1]; document.getElementById('aa').innerHTML=data; }); } }; } asd();为什么只输出了一个数据 0 2023-11-01

AI问答 getElementById('aa').innerHTML=data;这一行代码报错了，报错为stydu.html:91 Uncaught ReferenceError: getElementById is not defined at stydu.html:91:7 at Array.forEach (<anonymous>) at xhr.onload (stydu.html:89:11)如何解决 0 2023-11-01

AI问答 stydu.html:91 Uncaught ReferenceError: getElementById is not defined at stydu.html:91:7 at Array.forEach (<anonymous>) at xhr.onload (stydu.html:89:11) 20 2023-11-01

AI问答报错信息为 0 2023-11-01

AI问答 data.forEach(function(item,index,array){ data = item[1]; getElementById('aa').innerHTML=data;代码报错了 0 2023-11-01

AI问答 php是什么？ 0 2023-11-01

AI问答 mysql> SELECT S_no,S_name,final FROM student as st inner join score as sc on st.S_no=sc.S_no; ERROR 1052 (23000): Column 'S_no' in field list is ambiguous这是怎么回事 20 2023-11-01

AI问答 SELECT S_no,S_name,final FROM student as st inner join score as sc on st.S_no=sc.S_no; 0 2023-11-01

AI问答学不会php怎么办？ 20 2023-11-01

AI问答请问文中“$”是什么意思，有何用意 120 2023-11-01

AI问答我希望用input()函数来获取我需要的数字，并输出已排序和去重后的列表，我应该怎么写这个代码呢 0 2023-11-01

AI问答我希望在以上代码中删除列表中的重复项，但我不理解为什么返回值有空字符串，你能告诉应该怎么修改吗 0 2023-10-31

AI问答 mylist = input('请输入你的号码：') print("List = ",mylist) resList = set(mylist) print("Updated List = ",list(resList)) 0 2023-10-31

AI问答 ['1', '2', '3', ' ', '4'] ，返回值为什么会有 '', 0 2023-10-31

AI问答 2.写一个程序，功能是大小写转换把 $str = 'ABCdefgHigKLmn'; 转换成 'abcDEFGhIGklMN' 0 2023-10-31

AI问答 function convertCase($str) { $result = ''; $length = strlen($str); // 将字符串中的大写字母转换为小写字母 for ($i = 0; $i < $length; $i++) { if (ctype_upper($str[$i])) { $result .= strtolower($str[$i]); } else { $result .= $str[$i]; } } // 将字符串中的小写字母转换为大写字母 for ($i = 0; $i < $length; $i++) { if (ctype_lower($str[$i])) { $result .= strtoupper($str[$i]); } else { $result .= $str[$i]; } } return $result; } $str = 'ABCdefgHigKLmn'; $convertedStr = convertCase($str); echo $convertedStr; 0 2023-10-31

AI问答 .写一个程序，功能是大小写转换把 $str = 'ABCdefgHigKLmn'; 转换成 'abcDEFGhIGklMN' 0 2023-10-31

AI问答 $str = 'ABCdefgHigKLmn'; $result = ''; foreach(str_split($str) as $char) { $result.= $char; } echo $result;输出结果是多少 0 2023-10-31

AI问答 $str = 'ABCdefgHigKLmn'; $result = ''; foreach(str_split($str) as $char) { $result.= $char; } echo $result; 0 2023-10-31

AI问答 $str = 'ABCdefgHigKLmn'; 如何· 转换成 'abcDEFGhIGklMN' 0 2023-10-31

AI问答 PHP开发中常见的那些问题 0 2023-10-31

AI问答 if函数写一个点击图片跳转网页 0 2023-10-30

AI问答为什么会有php？ 0 2023-10-30

AI问答 mysql> select*from employees; +-----+--------+------+----------+---------+ | eno | ename | eage | eaddress | esalary | +-----+--------+------+----------+---------+ | E01 | tom | 35 | 海淀 | 8000 | | E02 | dennis | 24 | 朝阳 | 5000 | | E03 | john | 20 | 海淀 | 4000 | | E04 | rick | 41 | 朝阳 | 7000 | | E05 | bill | 45 | 西城 | 7500 | | E06 | frank | 35 | 海淀 | 6000 | | E07 | jank | 25 | 东城 | 3000 | | E08 | mike | 23 | 东城 | 3500 | +-----+--------+------+----------+---------+ 8 rows in set (0.00 sec) mysql> select*from departments; +-----+--------+----------+ | dno | dname | dmanager | +-----+--------+----------+ | D01 | 人事 | E04 | | D02 | 信息 | E01 | | D03 | 销售 | E05 | | D04 | 财务 | E06 | +-----+--------+----------+ 4 rows in set (0.00 sec)mysql> select*from jobs; +------+------+----------+ | eno | dno | duration | +------+------+----------+ | E01 | D02 | 6 | | E01 | D03 | 1 | | E01 | D04 | 2 | | E02 | D01 | 2 | | E02 | D04 | 0 | | E03 | D02 | 0 | | E04 | D01 | 4 | | E04 | D02 | 1 | | E05 | D03 | 2 | | E06 | D04 | 4 | | E07 | D04 | 1 | | E08 | D03 | 2 | +------+------+----------+ 12 rows in set (0.00 sec) 这有三个表, 查询和其部门经理住址相同的员工的姓名及经理姓名。 20 2023-10-29

AI问答 mysql> select*from employees; +-----+--------+------+----------+---------+ | eno | ename | eage | eaddress | esalary | +-----+--------+------+----------+---------+ | E01 | tom | 35 | 海淀 | 8000 | | E02 | dennis | 24 | 朝阳 | 5000 | | E03 | john | 20 | 海淀 | 4000 | | E04 | rick | 41 | 朝阳 | 7000 | | E05 | bill | 45 | 西城 | 7500 | | E06 | frank | 35 | 海淀 | 6000 | | E07 | jank | 25 | 东城 | 3000 | | E08 | mike | 23 | 东城 | 3500 | +-----+--------+------+----------+---------+ 8 rows in set (0.00 sec) mysql> select*from departments; +-----+--------+----------+ | dno | dname | dmanager | +-----+--------+----------+ | D01 | 人事 | E04 | | D02 | 信息 | E01 | | D03 | 销售 | E05 | | D04 | 财务 | E06 | +-----+--------+----------+ 4 rows in set (0.00 sec)mysql> select*from jobs; +------+------+----------+ | eno | dno | duration | +------+------+----------+ | E01 | D02 | 6 | | E01 | D03 | 1 | | E01 | D04 | 2 | | E02 | D01 | 2 | | E02 | D04 | 0 | | E03 | D02 | 0 | | E04 | D01 | 4 | | E04 | D02 | 1 | | E05 | D03 | 2 | | E06 | D04 | 4 | | E07 | D04 | 1 | | E08 | D03 | 2 | +------+------+----------+ 12 rows in set (0.00 sec) 这有三个表，4)查询和其部门经理住址相同的员工的姓名及经理姓名。 0 2023-10-29

AI问答 mysql> select*from employees; +-----+--------+------+----------+---------+ | eno | ename | eage | eaddress | esalary | +-----+--------+------+----------+---------+ | E01 | tom | 35 | 海淀 | 8000 | | E02 | dennis | 24 | 朝阳 | 5000 | | E03 | john | 20 | 海淀 | 4000 | | E04 | rick | 41 | 朝阳 | 7000 | | E05 | bill | 45 | 西城 | 7500 | | E06 | frank | 35 | 海淀 | 6000 | | E07 | jank | 25 | 东城 | 3000 | | E08 | mike | 23 | 东城 | 3500 | +-----+--------+------+----------+---------+ 8 rows in set (0.00 sec) mysql> select*from departments; +-----+--------+----------+ | dno | dname | dmanager | +-----+--------+----------+ | D01 | 人事 | E04 | | D02 | 信息 | E01 | | D03 | 销售 | E05 | | D04 | 财务 | E06 | +-----+--------+----------+ 4 rows in set (0.00 sec)mysql> select*from jobs; +------+------+----------+ | eno | dno | duration | +------+------+----------+ | E01 | D02 | 6 | | E01 | D03 | 1 | | E01 | D04 | 2 | | E02 | D01 | 2 | | E02 | D04 | 0 | | E03 | D02 | 0 | | E04 | D01 | 4 | | E04 | D02 | 1 | | E05 | D03 | 2 | | E06 | D04 | 4 | | E07 | D04 | 1 | | E08 | D03 | 2 | +------+------+----------+ 12 rows in set (0.00 sec) 这有三个表，3)统计各部门的职工的工资总额，并按照总额大小降序排列。 0 2023-10-29

AI问答 mysql> select*from employees; +-----+--------+------+----------+---------+ | eno | ename | eage | eaddress | esalary | +-----+--------+------+----------+---------+ | E01 | tom | 35 | 海淀 | 8000 | | E02 | dennis | 24 | 朝阳 | 5000 | | E03 | john | 20 | 海淀 | 4000 | | E04 | rick | 41 | 朝阳 | 7000 | | E05 | bill | 45 | 西城 | 7500 | | E06 | frank | 35 | 海淀 | 6000 | | E07 | jank | 25 | 东城 | 3000 | | E08 | mike | 23 | 东城 | 3500 | +-----+--------+------+----------+---------+ 8 rows in set (0.00 sec) mysql> select*from departments; +-----+--------+----------+ | dno | dname | dmanager | +-----+--------+----------+ | D01 | 人事 | E04 | | D02 | 信息 | E01 | | D03 | 销售 | E05 | | D04 | 财务 | E06 | +-----+--------+----------+ 4 rows in set (0.00 sec)mysql> select*from jobs; +------+------+----------+ | eno | dno | duration | +------+------+----------+ | E01 | D02 | 6 | | E01 | D03 | 1 | | E01 | D04 | 2 | | E02 | D01 | 2 | | E02 | D04 | 0 | | E03 | D02 | 0 | | E04 | D01 | 4 | | E04 | D02 | 1 | | E05 | D03 | 2 | | E06 | D04 | 4 | | E07 | D04 | 1 | | E08 | D03 | 2 | +------+------+----------+ 12 rows in set (0.00 sec) 这有三个表，查询同时在三个部门工作的雇员和姓名。 20 2023-10-29

AI问答查询同时在三个部门工作的雇员和姓名。 0 2023-10-29

AI问答 mysql> select*from employees; +-----+--------+------+----------+---------+ | eno | ename | eage | eaddress | esalary | +-----+--------+------+----------+---------+ | E01 | tom | 35 | 海淀 | 8000 | | E02 | dennis | 24 | 朝阳 | 5000 | | E03 | john | 20 | 海淀 | 4000 | | E04 | rick | 41 | 朝阳 | 7000 | | E05 | bill | 45 | 西城 | 7500 | | E06 | frank | 35 | 海淀 | 6000 | | E07 | jank | 25 | 东城 | 3000 | | E08 | mike | 23 | 东城 | 3500 | +-----+--------+------+----------+---------+ 8 rows in set (0.00 sec) mysql> select*from departments; +-----+--------+----------+ | dno | dname | dmanager | +-----+--------+----------+ | D01 | 人事 | E04 | | D02 | 信息 | E01 | | D03 | 销售 | E05 | | D04 | 财务 | E06 | +-----+--------+----------+ 4 rows in set (0.00 sec)mysql> select*from jobs; +------+------+----------+ | eno | dno | duration | +------+------+----------+ | E01 | D02 | 6 | | E01 | D03 | 1 | | E01 | D04 | 2 | | E02 | D01 | 2 | | E02 | D04 | 0 | | E03 | D02 | 0 | | E04 | D01 | 4 | | E04 | D02 | 1 | | E05 | D03 | 2 | | E06 | D04 | 4 | | E07 | D04 | 1 | | E08 | D03 | 2 | +------+------+----------+ 12 rows in set (0.00 sec) 这有三个表，查询同时在三个部门工作的雇员和姓名。 0 2023-10-29

AI问答 mysql> select*from employees; +-----+--------+------+----------+---------+ | eno | ename | eage | eaddress | esalary | +-----+--------+------+----------+---------+ | E01 | tom | 35 | 海淀 | 8000 | | E02 | dennis | 24 | 朝阳 | 5000 | | E03 | john | 20 | 海淀 | 4000 | | E04 | rick | 41 | 朝阳 | 7000 | | E05 | bill | 45 | 西城 | 7500 | | E06 | frank | 35 | 海淀 | 6000 | | E07 | jank | 25 | 东城 | 3000 | | E08 | mike | 23 | 东城 | 3500 | +-----+--------+------+----------+---------+ 8 rows in set (0.00 sec) mysql> select*from departments; +-----+--------+----------+ | dno | dname | dmanager | +-----+--------+----------+ | D01 | 人事 | E04 | | D02 | 信息 | E01 | | D03 | 销售 | E05 | | D04 | 财务 | E06 | +-----+--------+----------+ 4 rows in set (0.00 sec)mysql> select*from jobs; +------+------+----------+ | eno | dno | duration | +------+------+----------+ | E01 | D02 | 6 | | E01 | D03 | 1 | | E01 | D04 | 2 | | E02 | D01 | 2 | | E02 | D04 | 0 | | E03 | D02 | 0 | | E04 | D01 | 4 | | E04 | D02 | 1 | | E05 | D03 | 2 | | E06 | D04 | 4 | | E07 | D04 | 1 | | E08 | D03 | 2 | +------+------+----------+ 12 rows in set (0.00 sec) 这有三个表，查询工作年限大于3年的雇员信息，返回雇员号、姓名、年龄、地址、薪水、部门名称、工作年限 0 2023-10-29

AI问答 mysql> select*from employees; +-----+--------+------+----------+---------+ | eno | ename | eage | eaddress | esalary | +-----+--------+------+----------+---------+ | E01 | tom | 35 | 海淀 | 8000 | | E02 | dennis | 24 | 朝阳 | 5000 | | E03 | john | 20 | 海淀 | 4000 | | E04 | rick | 41 | 朝阳 | 7000 | | E05 | bill | 45 | 西城 | 7500 | | E06 | frank | 35 | 海淀 | 6000 | | E07 | jank | 25 | 东城 | 3000 | | E08 | mike | 23 | 东城 | 3500 | +-----+--------+------+----------+---------+ 8 rows in set (0.00 sec) mysql> select*from departments; +-----+--------+----------+ | dno | dname | dmanager | +-----+--------+----------+ | D01 | 人事 | E04 | | D02 | 信息 | E01 | | D03 | 销售 | E05 | | D04 | 财务 | E06 | +-----+--------+----------+ 4 rows in set (0.00 sec)mysql> select*from jobs; +------+------+----------+ | eno | dno | duration | +------+------+----------+ | E01 | D02 | 6 | | E01 | D03 | 1 | | E01 | D04 | 2 | | E02 | D01 | 2 | | E02 | D04 | 0 | | E03 | D02 | 0 | | E04 | D01 | 4 | | E04 | D02 | 1 | | E05 | D03 | 2 | | E06 | D04 | 4 | | E07 | D04 | 1 | | E08 | D03 | 2 | +------+------+----------+ 12 rows in set (0.00 sec) 1)查询工作年限大于3年的雇员信息，返回雇员号、姓名、年龄、地址、薪水、部门名称、工作年限。 0 2023-10-29

AI问答 SELECT employees.eno, employees.ename, employees.eage, employees.eaddress, employees.esalary, departments.dname, departments.duration FROM employees JOIN departments ON employees.dept_id = departments.dept_id JOIN jobs ON employees.job_id = jobs.job_id WHERE employees.duration > 3; 0 2023-10-29

AI问答有三个表employees,departments,jobs,查询工作年限大于3年的雇员信息，返回雇员号eno、姓名ename、年龄eage、地址eaddress、薪水esalary、部门名称dname、工作年限duration 。 0 2023-10-29

AI问答有三个表employees,departments,jobs,查询工作年限大于3年的雇员信息，返回雇员号、姓名、年龄、地址、薪水、部门名称、工作年限。 20 2023-10-29

AI问答 ysql> SELECT employees.eno, employees.ename, employees.eage, employees.eaddress, employees.esalary, departments.dname, jobs.duration -> -> FROM employees -> -> JOIN departments ON employees.dno = departments.dno -> -> JOIN jobs ON employees.eno= jobs.eno -> -> WHERE jobs.duration > 3; ERROR 1054 (42S22): Unknown column 'employees.dno' in 'on clause'这是怎么回事 0 2023-10-29

AI问答有三个表employees,departments,jobs,查询工作年限大于3年的雇员信息，返回雇员号、姓名、年龄、地址、薪水、部门名称、工作年限。 20 2023-10-29

AI问答 1)查询工作年限大于3年的雇员信息，返回雇员号、姓名、年龄、地址、薪水、部门名称、工作年限。 20 2023-10-29

AI问答 CREATE TABLE employees ( eno CHAR(3) PRIMARY KEY, ename VARCHAR(20) NOT NULL, eage INT, eaddress VARCHAR(20), esalary INT ); CREATE TABLE departments ( dno CHAR(3) PRIMARY KEY, dname VARCHAR(20) NOT NULL, dmanager CHAR(3), FOREIGN KEY (dmanager) REFERENCES employees(eno) ); CREATE TABLE jobs ( eno CHAR(3), dno VARCHAR(20), duration INT, FOREIGN KEY (eno) REFERENCES employees(eno), FOREIGN KEY (dno) REFERENCES employees(eno) ); 如何创建这三个表 20 2023-10-29

AI问答如何创建呢 0 2023-10-29

AI问答 php是什么？ 0 2023-10-29

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