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查询公司员工工资 最大值 最小值 平均值 总和 SELECT MAX(salary),MIN(salary),AVG(salary),SUM(salary) FROM employees; 查询各jo...0168
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1：where能不能使用聚合函数进行过滤 2查询员工工资最大值，最小值，平均值，总和 SELECT MAX(salary),MIN(salary),AVG(salary), SUM(salary) F...0134
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SELECT MAX(salary),MIN(salary),AVG(salary),SUM(salary) FROM employees; SELECT job_id,MAX(salary),MIN...0119
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SELECT MAX(salary),MIN(salary),AVG(salary), SUM(salary) FROM employees; SELECT job_id, COUNT(salary)...0114
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1 SELECT MAX(salary),MIN(salary),AVG(salary),SUM(salary) FROM employees; 2 SELECT job_id,MAX(salary)...0131
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2 SELECT MAX(salary),MIN(salary),AVG(salary),SUM(salary) FROM employees; 3 SELECT job_id,MAX(salary)...0165
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第八章 子查询 需求：谁的工资比Abel高？ SELECT salary FROM employees WHERE last_nameAbel; SELECT last_name,salary F...0116
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第8章 子查询 需求：谁的工资比Abel高？ 方式1： SELECT salary FROM employees WHERE last_nameAbel; SELECT last_name,sa...0160
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