我正在使用Python创建一个SQLite数据库,其中包含来自多个CSV文件的数据。从文件A中,我成功地创建了一个表并向该表中添加了条目。我想从文件B向数据库中添加其他列。文件A和文件B中的行不匹配,但它们需要在数据库中匹配。你知道吗
我为代码的长度道歉-我正在从CSV文件中选择要添加到数据库的特定行。我在这里包括了所有的代码,以防上下文有帮助。你知道吗
此代码适用于:
with open('/Users/Leo/Desktop/accord_key.csv','rU') as accord_csv:
accord_csv_reader = csv.reader(accord_csv)
for row in accord_csv_reader:
MaskID = row[0]
female = row[1]
age = row[2]
arm = row[3]
cvd_hx_baseline = row[6]
female = int(female)
age = float(age)
arm = int(arm)
cvd_hx_baseline = int(cvd_hx_baseline)
if age < 50: continue
if ((arm == 5) or (arm == 6) or (arm == 7) or (arm == 8)): continue
female = str(female)
age = str(age)
arm = str(arm)
cvd_hx_baseline = str(cvd_hx_baseline)
cur.execute('INSERT OR IGNORE INTO accord_baseline (MaskID) VALUES (?)',
(MaskID,)
)
cur.execute('UPDATE OR IGNORE accord_baseline SET female = '+female+' WHERE MaskID=?',
(MaskID,)
)
cur.execute('UPDATE OR IGNORE accord_baseline SET age = '+age+' WHERE MaskID=?',
(MaskID,)
)
cur.execute('UPDATE OR IGNORE accord_baseline SET arm = '+arm+' WHERE MaskID=?',
(MaskID,)
)
cur.execute('UPDATE OR IGNORE accord_baseline SET cvd_hx_baseline = '+cvd_hx_baseline+' WHERE MaskID=?',
(MaskID,)
)
age = float(age)
if age >= 75:
cur.execute('UPDATE OR IGNORE accord_baseline SET age_75 = 1 WHERE MaskID=?',
(MaskID,)
)
conn.commit()
accord_csv.close()
此代码不起作用:
with open('/Users/Leo/Desktop/otherlabs.csv','rU') as labs_csv:
labs_csv_reader = csv.reader(labs_csv)
count = 0
for row in labs_csv_reader:
MaskID = row[0]
visit = row[1]
gfr = row[7]
if visit == 'BLR':
cur.execute('UPDATE OR IGNORE accord_baseline SET mdrd = '+gfr+' WHERE MaskID=?',
(MaskID,)
)
conn.commit()
labs_csv.close()
由于我在搜索中找不到答案,我非常感谢您的帮助!!你知道吗
在您的例子中,这可能是问题所在,也可能不是问题所在—您只正确地进行了一半的转义,因此,如果
'
在您的数据中,SQL查询可能会损坏。你知道吗不要这样做:
请改为:
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