阅读一个Sql数据库和输出到Excel中的Excel

我是相当新的python并试图在一个项目，需要我从SQL(.db)数据库中提取数据并将这些数据输出到Excel文件的项目。

我的数据库文件有很多的数据，但我设法打印的结构如下

 Run ID | Environment 1 52 2 52 3 52 4 52 5 72 6 72 7 72 8 72 .... 

现在我需要能够将这些值输出到Excel电子表格中，

52 | 72 | 92 | 112 | 132

下面是我目前的代码，它允许我输出

52 | 52 | 52 | 52 | 72 | 72 | 72 | 72

一个是从模块访问数据库c.fetchall()任何帮助表示赞赏

 Access_Database_Module.Access_Database(DB) x = 2 DBcommand = "SELECT * FROM " + a[x][0] print(a[x][0]) c.execute(DBcommand) y = c.fetchall() x = y workbook = xls.Workbook('Environment.xlsx') worksheet = workbook.add_worksheet('Environment Direction') rowNum = 0 colNum = 1 workbook = xls.Workbook('Environment.xlsx') worksheet = workbook.add_worksheet('Environment Direction') for item in y: while colNum == colNum + 1 : colNum worksheet.write(rowNum, colNum, item[14]) colNum += 1 workbook.close() 

Answer 1

你需要改变你的查询，如下所示：

DBcommand =“SELECT distinct [Environment] FROM”+ a [x] [0]

这将返回您正在寻找的唯一值

Answer 2

你想从你的数据库列删除重复项，并将其存储在Excel中？ 如果是这样，那么下面的代码可能会帮助你。

 import pandas as pd import sqlite3 # get DB connection con = sqlite3.connect("your DB connection") # Read sqlite query results into a pandas DataFrame df = pd.read_sql_query("SELECT * from yourDB", con) # verify that result of SQL query is stored in the dataframe print(df.head()) con.close() # if you want to remove duplicate based on particular column then do this df.drop_duplicates(subset=[column_name],inplace=True) # else do this df.drop_duplicates(inplace=True) # export to Excel file df.to_excel("filename.xlsx",index=False)