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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
Getting sorted mysql records with unique value +0.46
Get the max date from each ROW 0.00
COUNT() return 0 on certain column -2.07
How to give a database constraint to ensure this behavior in a table? +0.60
SQL server update with 2 left joins and a where clause 0.00
Count(*) filtering on indexed datetime field runs too long +0.48
why if($row['field'] == value) work like SELECT WHERE field... +1.85
how to sum after group by return in mysql? 0.00
How to get 0 from max function incase there are no records -1.19
slow Postgres query, possible indexing fix? 0.00
Combining two columns from separate tables into one in SQL Oracle S... 0.00
Unable to drop constraint - SQL Server 2008 R2 -0.86
Use EXISTS with derived table +2.43
MySQL sorting according to 2 records 0.00
using case to select multiple conditions +0.47
Difference in minutes between 2 timestamps -2.21
Checking for two separate things in an sql query 0.00
COUNT(*) Includes Null Values? +0.42
how to use pivot with self join +1.74
What does select 1 do? -0.65
Sorting Summed Collection by Timestamp +0.47
Get user's highest score from a table +0.16
T-SQL Aggregate function subquery -1.04
Loading detail from database with ajax 0.00
Searching Different Tables In Same Query -0.00
Query to find lakes that are in multiple states 0.00
Co-related Nested Query in MySQL -0.03
Nullable Bit field true or false detection +1.59
Group By: What if I don't want to perform an aggregate function... -0.34
mysql delete rows with duplicate dates keeping the latest one 0.00
sql take all querys from last month 0.00
How to get maximal/minimal significant value of multiple fields whe... -0.99
mysql query return only the value that has not change over time +2.45
Can someone explain these three SQL queries to me? -1.91
Hospital Setting. "Flag" a patient if a result has a spec... 0.00
MYSQL select count of distinct values from comma separated 0.00
Sql Query to bring back all data into one row 0.00
Count started conversations in MYSQL +0.17
varchar as a foreign key constraint -0.54
Select records if they contain all of the subquery results 0.00
Force computed column to int 0.00
How to split one column into multiple colums using T-sql -0.75
GROUP_BY, MAX() and only_full_group_by +2.15
This is suppose to be easy but I cant seem to figure out how to get... 0.00
how to check if foreign key exists in other table before adding a r... 0.00
Show most popular items of today? 0.00
Hackerrank SQL Top Competitors (mySQL) 0.00
How to select record except those that match the join? +2.77
How to Set HOURS and Minutes from a table into a timestamp -0.02
When using foreign keys do you always have to join? -0.42