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Juan Carlos Oropeza

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1574.03 (3,598th) 		Reputation
37,187 (3,024th)
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Title Δ
Delete duplicate data in SQL preserving the oldest entry -1.24
Find MAX value in column A for each Person when column B = X 0.00
sql: check for existence of only one specific item for an id, when... +1.96
Select all the data from another table even if corresponding value... -0.28
Query set restriction SQL database 0.00
Preferred table structure 0.00
Postgres subqueries running extremely slowly when joined -0.55
Junction table/many to many relationship -0.84
Self JOIN linq with not equal -0.54
will angular update one `ng-model` inside a <tfoot> 0.00
Top 20 Group Ranking Query - Optimization -1.66
What is the time complexity of searching on two fields in mysql 0.00
Add group by to Oracle Query and get an error 0.00
Vertica - Filter results using HAVING only on some columns 0.00
My table has lots of values in a column, however when I run a COUNT... 0.00
Finding top 10 trending tweets in Hive 0.00
SQL Server datetime sorting +0.37
Write a sql statement to query one table based on columns in other... -0.60
prevent evaluation of non-matching case 0.00
How to group by on a highest value -0.06
SQL Update all rows on new column with exists column data +1.38
SQL Update all rows on new column with exists column data -1.45
Extracting the greatest value from a time series in Postgresql +1.80
Count of rows for a particular column and display with the last row -0.85
PostgreSQL Pick one single random row from multiple tables 0.00
Get content from 2 tables -0.93
Column A and Column B equal new Value for Column C in table 2 -0.88
MySQL Update null column values incrementally in time order 0.00
SQL Server Count items available -0.65
SQL Server: reset identity on any delete action 0.00
filter the most recent line, basing on the date -0.99
get more than three months data in sql 0.00
Mysql Column cannot be null error when there is no result using LEF... -2.14
error with addwithvalue sql parameter -2.01
Mysql multiple ORDER BY with UNION -0.13
SELECTING data with CASE statement issue -1.68
how to retrieve value from two table in mysql using foreing Key is... +0.39
How to Get SUM() inside GROUP_CONCAT() 0.00
update table sql based on two criterias +0.38
Concatenating two columns in Oracle giving performance issue +0.10
Looking for mysql rows between certain unix time stamps +2.02
How to get the average of every three records in a column starting... +1.09
Select all ids for of the friends for a particular user 0.00
Create a ranking for user +0.43
Nested WHILE loop - SQL Server 2000 -0.60
Group and sum worked hours by days +1.99
Calculating total active time from on/off activity log +1.57
How to insert a Null Value to a column if there is no data provided... -2.27
SQL Select - combine two tables (while transforming rows in columns) +2.13
Why SUM() returns NULL when no row is selected? -1.41