我正在尝试通过cursor.execute发送SQL语句,但是当字符串中包含多个语句时,无法获得正确的语法。
我已经用简单的insert语句测试了cursor.execute(),并很好地填充了tsql数据库表。
当尝试将适用于我的包含多个语句的cursor.execute()字符串的语法应用时,就会出现问题。
4/3更新:所以我认为这是我需要解决的问题,看来我需要使用格式(“ SQL语句值(?,?,?)”,变量)。由于我没有引用列,因此如果尝试使用,则会出现错误:'INSERT([Incident_Id],[Incident_Type],[Priority])VALUES(IncIncident_ID,IncIncident_Type,IncPriority)'
那么如何将这种语法(“ SQL语句值(?,?,?)”,变量)合并到cursor.execute中,并与其他sql语句一起执行?我试过了,但是出错了... cursor_insert.execute('合并为dbo.jjy_table作为目标' 'USING Incidents_All AS Source' 'ON Target.Incident_Id = Source.Incident_ID' “当目标未匹配时” '“ INSERT([Incident_Id],[Incident_Type],[Priority]) 值(?,?,?)“,IncIncident_ID,IncIncident_Type,IncPriority' “匹配之后” '更新设置Target。[Incident_Type] = IncIncident_Type,Target。[Priority] = IncPriority;')
import pyodbc
import os.path
import logging
import datetime
import time
import os
import logging.handlers
conn = pyodbc.connect("Driver={SQL Server Native Client 11.0};"
"Server=TESTSERVER;"
"Database=ITSM;"
"Trusted_Connection=yes;"
"MARS_Connection=Yes;")
cursor=conn.cursor()
cursor_select = conn.cursor()
cursor_insert = conn.cursor()
if conn:
print('***** Connected to TESTSERVER *****')
select_str="SELECT TOP 5 Incident_ID,Incident_Type,Priority FROM
incidents_all WHERE incidents_all.Status NOT IN ('Closed','Resolved')"
cursor_select.execute(select_str)
while True:
row = cursor_select.fetchone()
if not row:
break
print(' Row: ', row)
IncIncident_ID= row[0]
IncIncident_Type=row[1]
IncPriority=row[2]
print('IncIncident_ID: ',IncIncident_ID)
print('IncIncident_Type: ',IncIncident_Type)
print('IncPriority: ',IncPriority)
# This works, I get the sytax, I have a statement and passing in the
#variables .
cursor_insert.execute("INSERT INTO dbo.jjy_table ([Incident_Id],
[Incident_Type],[Priority]) values
(?,?,?)",IncIncident_ID,IncIncident_Type,IncPriority)
#This Doesn't work in Python but the SQL code works in SQL if I remove
#the value (?,?,?)
# I believe issue is with Python syntax but not sure how to fix. How do
#I incorporate the syntax above into a string of multiple statements.
cursor_insert.execute("MERGE INTO dbo.jjy_table as Target USING
Incidents_All AS Source ON Target.Incident_Id = Source.Incident_ID WHEN
NOT MATCHED BY Target THEN "INSERT ([Incident_Id],[Incident_Type],
[Priority]) values (?,?,?)",IncIncident_ID, IncIncident_Type,
IncPriority" WHEN MATCHED THEN UPDATE SET Target.[Incident_Type] =
IncIncident_Type, Target.[Priority] = IncPriority;")
cursor.commit()
conn.close()
答案 0 :(得分:0)
我认为您希望将参数分组为一个序列,这是execute()
的第二个参数:
cursor_insert.execute("INSERT INTO dbo.jjy_table ([Incident_Id],
[Incident_Type],[Priority]) values
(?,?,?)", [IncIncident_ID,IncIncident_Type,IncPriority] )
the PYODBC wiki上有更多信息。
基于使用merge
语句进行更新。即使您要复制变量,也需要指定列表中的每个参数。请注意,下面的语句有5个?
,并且在初始SQL字符串之后有5个execute()
参数。
cursor_insert.execute("""
MERGE INTO dbo.jjy_table as Target
USING Incidents_All AS Source
ON Target.Incident_Id = Source.Incident_ID
WHEN NOT MATCHED BY Target THEN
INSERT ([Incident_Id],[Incident_Type],[Priority]) values (?,?,?)
WHEN MATCHED THEN
UPDATE SET Target.[Incident_Type] = ?, Target.[Priority] = ?;
""", IncIncident_ID, IncIncident_Type, IncPriority, IncIncident_Type, IncPriority)