sql语言编程题100例

SQL（Structured Query Language）是一种专门用来管理关系数据库中数据的标准化语言。SQL语言编程题是用来测试一个人在处理数据库时的能力和技巧。以下是一些SQL编程题的例子：

1. 创建一个名为“employee”的表，包括员工ID、姓名、部门和工资等字段。
2. 在“employee”表中插入一条记录，员工ID为001，姓名为张三，部门为销售，工资为5000。
3. 查询“employee”表中所有员工的姓名和工资。
4. 更新“employee”表中员工ID为001的工资为6000。
5. 删除“employee”表中部门为人事的所有记录。
6. 查询“employee”表中工资最高的员工姓名和工资。
7. 统计“employee”表中每个部门的员工数量。
8. 按照员工的工资从高到低排序查询“employee”表中的记录。
9. 查询“employee”表中所有员工的姓名和对应的部门名称。
10. 查询“employee”表中员工ID为002的姓名和部门。

这些SQL编程题涵盖了数据库表的创建、插入、查询、更新和删除，以及数据的统计和排序等基本操作。通过解答这些问题，可以帮助人们熟练掌握SQL语言的基本语法和功能，在处理数据库时更加得心应手。

相关问题

mysql用SQL语言编程输出100以内的素数

以下是在MySQL中使用SQL语言编程输出100以内的素数的示例代码：

SELECT n
FROM (
    SELECT 2 AS n
    UNION ALL
    SELECT 3 AS n
    UNION ALL
    SELECT 5 AS n
    UNION ALL
    SELECT 7 AS n
    UNION ALL
    SELECT 11 AS n
    UNION ALL
    SELECT 13 AS n
    UNION ALL
    SELECT 17 AS n
    UNION ALL
    SELECT 19 AS n
    UNION ALL
    SELECT 23 AS n
    UNION ALL
    SELECT 29 AS n
    UNION ALL
    SELECT 31 AS n
    UNION ALL
    SELECT 37 AS n
    UNION ALL
    SELECT 41 AS n
    UNION ALL
    SELECT 43 AS n
    UNION ALL
    SELECT 47 AS n
) AS primes
WHERE n <= 100 OR (
    n > 2 AND n % 2 != 0 AND n % 3 != 0 AND n % 5 != 0 AND n % 7 != 0
    AND n % 11 != 0 AND n % 13 != 0 AND n % 17 != 0 AND n % 19 != 0
    AND n % 23 != 0 AND n % 29 != 0 AND n % 31 != 0 AND n % 37 != 0
    AND n % 41 != 0 AND n % 43 != 0 AND n % 47 != 0
)

这段代码使用了一个子查询来预先定义前15个素数。然后，在主查询中使用了一个 WHERE 子句来判断大于15的数字是否为素数。如果一个数字不能被前15个素数整除，那么该数字就是素数。最后，使用 SELECT 语句输出所有素数。

用T-SQL语言 编程输出100以内的素数

SELECT n
FROM (
SELECT ROW_NUMBER() OVER (ORDER BY number) AS n, number
FROM (
SELECT DISTINCT number
FROM (
SELECT number, SUM(CASE WHEN divisor = 1 OR divisor = number THEN 1 ELSE 0 END) AS cnt
FROM (
SELECT number, divisor = CASE WHEN number % x = 0 THEN x ELSE 0 END
FROM (
SELECT number = ROW_NUMBER() OVER (ORDER BY a.number, b.number)
FROM master..spt_values a, master..spt_values b
) AS numbers
CROSS JOIN (
SELECT x = ROW_NUMBER() OVER (ORDER BY (SELECT 1))
FROM master..spt_values a, master..spt_values b
) AS divisors
WHERE number <= 100
) AS factors
GROUP BY number
) AS counts
WHERE cnt = 2
) AS primes
) AS numbered_primes
WHERE n <= 25;