带变量

Question

testid = 69
query = """SELECT * FROM basic_info WHERE ownerid=%s"""
cur.execute(query, testid)
print cur.fetchone()

尝试此操作时出现整数错误。我试过把testid转换成一个没有运气的字符串。

Answer 1

我更喜欢这种插入参数的方法，因为它很清楚：

query = "SELECT * FROM basic_info WHERE ownerid = %(testid)s"
cur.execute(query, params = { 'testid': testid })

Answer 2

Cursor.execute的第二个参与者应该是序列（tuple或list）或映射（dict）：

testid = 69
query = """SELECT * FROM basic_info WHERE ownerid=%s"""
cur.execute(query, [testid])  # <--
print cur.fetchone()