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Roman Pekar

Rating
1553.33 (7,028th) 		Reputation
74,450 (1,126th)
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Title Δ
Extracting nvarchar value from XML in T-SQL: only one character ret... 0.00
Transformation of transactions to numpy array 0.00
SQL - Can I use a SELECT statement inside a GROUP BY clause? 0.00
SQL Server For XML Query -0.64
query a pandas dataframe based in index and datacolumns +0.14
Parent child relationship - TSQL 0.00
SQL - Unable to Convert a string in to YYYYMMDD format 0.00
numpy - how do I count the occurrence of items in nested lists by i... -1.36
Pandas read_csv expects wrong number of columns +0.35
Converting tuples to multiple indices in a Pandas Dataframe 0.00
Querying SQL Server 2005 for certain XML values -0.12
Resample Pandas Dataframe with "bin size"/"frequency... 0.00
define aggfunc for each values column in pandas pivot table 0.00
python pandas applying for loop and groupby function 0.00
Subtract a column from one pandas dataframe from another 0.00
sum with sql and direct condition +0.17
How can I get and compare two XML attributes using TSQL where the X... +1.59
Eliminate Duplicates of a List (Python) -0.68
Dynamic SQL: How to Convert IN to several OR statements 0.00
Change some strings with CASE expression on postgresql 0.00
Pandas dataframe get first row of each group 0.00
Pandas: drop_duplicates with condition -0.22
mapping of one column with another two 0.00
How to calculate a new field in python using a linear relationship 0.00
Convert one row of a pandas dataframe into multiple rows 0.00
Multiple rows in one column SQL Server -0.13
averaging every five minutes data as one datapoint in pandas datafr... 0.00
Subtract values in a data frame ignoring specific keys -0.98
Python Pandas max value of selected columns +1.73
Sum of Highest 5 numbers in SQL Server 2000 +0.96
SQL XML Explicit problems with creating xml tree (parent-child) +0.38
PostgreSQL query to get attributes based on join condition and max(... 0.00
Append string to the start of each value in a said column of a pand... 0.00
Find movies with highest number of awards in certain year - code du... +1.90
Calculating rolling_std on 4 columns in python pandas to calculate... 0.00
Get XML element name and the attribute value using SQL XPATH query +0.49
generate_series for Min and Max dates 0.00
Combine date column and time column into datetime column 0.00
How to parse XML in TSQL 0.00
Use ternary operator in apply function in pandas dataframe, without... +2.64
Run an OLS regression with Pandas Data Frame +0.96
Python Pandas fuzzy merge/match with duplicates 0.00
Construct pandas DataFrame from list of tuples +1.63
how to update element name in a xml column in sql server -0.64
Pandas Handling Missing Values when going from Data Frame to Pivot... 0.00
Select with variable LIMIT value 0.00
How to replace an array of strings in a column of text in PostgreSQL? 0.00
How to access XML-Node above cursor in stored procedure? +0.38
Gaussian elimination - pivoting using slicing in python 0.00
Looping a merge for a amount of csv files using pandas 0.00