吴裕雄 python oracle子查询的用法（3）

import cx_Oracle

conn = cx_Oracle.connect("scott/admin@localhost:1521/orcl")
cursor = conn.cursor()

sql = "select * from emp where deptno=(select deptno from dept where dname='%s')" % ('RESEARCH')
cursor.execute(sql)
result = cursor.fetchall()
for row in result:
print(row)

sql = "select * from emp join dept on emp.deptno=dept.deptno where dept.dname='%s'" % ('RESEARCH')
cursor.execute(sql)
result = cursor.fetchall()
for row in result:
print(row)

sql = "select * from emp where sal>(select min(sal) from emp) and sal<(select max(sal) from emp)"
cursor.execute(sql)
result = cursor.fetchall()
for row in result:
print(row)

sql = "select * from emp where deptno in (select deptno from dept where dname<>'%s')" % ('SALES')
cursor.execute(sql)
result = cursor.fetchall()
for row in result:
print(row)

sql = "select * from emp where sal>any(select sal from emp where deptno=10)and deptno<>10"
cursor.execute(sql)
result = cursor.fetchall()
for row in result:
print(row)

sql = "select * from emp where sal>all(select sal from emp where deptno=30)"
cursor.execute(sql)
result = cursor.fetchall()
for row in result:
print(row)

sql = "select * from emp f where sal>(select avg(sal) from emp where job=f.job)"
cursor.execute(sql)
result = cursor.fetchall()
for row in result:
print(row)

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吴裕雄 python oracle子查询的用法（3）

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