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SELECT e.employee_id,d.department_name FROM employees e,departments d WHERE e.department_idd.departm...0379 -
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我们以前上学那会儿，本科低年级学生都在浦口，光我们那一级大一新生就有三千多人。后来同班同学还回忆浦口的我如何如何好，其实也没有——可能只是他们把自己的好恰好投射到我身上，我也特别想表现。浦口那会儿有一...
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/ 内连接 vs 外连接咱们之前写的都是内连接找一个之前写过的例子/查询员工id和部门名字SELECT e.employee_id,d.department_nameFROM employees e,...0462 -
SELECT last_name,department_name FROM employees emp,departments dep where emp.department_iddep.depar...0374
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限定词一、冠词不定冠词定冠词零冠词1.不定冠词（a/an） 用于单数可数名词前面，修饰该单数可数名词，泛指一类事物or人。用法口诀：不定冠词 a 和 an，a 后辅来 an 后元。注：此处的元辅音指的...0975 -
SELECT last_name,department_name FROM employees e,departments d; WHERE e.department_id d.department...0363
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SELECT last_name,department_name FROM employees e,departments d WHERE e.department_idd.department_id...0384
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SELECT last_name,department_name FROM employees,departments WHERE employees.department_iddepartments...0361
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SELECT last_name,department_name from employees, departments WHERE employees.department_iddepartment...0379
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select emp.last_name,dep.department_name from employees emp,departments dep where emp.department_idd...0394 -
SELECT first_name,department_name FROM employees,departments WHERE employees.department_iddepartment...0371
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SELECT first_name, last_name,department_name FROM employees,departments where employees.department_i...0392