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Clodoaldo Neto

Rating
1558.74 (5,846th) 		Reputation
79,063 (1,057th)
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Title Δ
GROUP BY consecutive dates delimited by gaps +2.04
Crosstab with a large or undefined number of categories +0.51
Merging two version-tracking tables while filling in values +0.49
Do SELECT from a set of tables one by one +0.51
Improve performance or redesign 'greatest-n-per-group' mysql query -1.70
Outputting mySQL Result with data from one column grouped into a si... 0.00
Generate sequence of dates used in for loop +2.65
Postgresql - XML to string conversion issue -0.10
Distinct Pagination with ROW_NUMBER() and Total Count in ASP.Net +0.01
Humanized or natural number sorting of mixed word-and-number strings -1.54
How to label duplicate entries in MySQL? +2.02
How do I get all combinations of data from a MySQL table? -0.02
Query for only integers Rails 2.3 0.00
mysql outfile column with leading zeros 0.00
SQL multiple joins on same table such that an entity has all fields... -0.97
T-SQL ORDER BY according to a condition +0.49
How to use SQL LIKE condition with multiple values in PostgreSQL? +1.23
Searching for id with most matches in separate keyword table -1.43
Rails LIMIT per GROUP -0.12
Design custom query builder with filters 0.00
Postgres function with list argument and in clause +2.84
select messages sent by user or to user 0.00
Mixing string with query MySQL 0.00
How to fetch the result of last row of conversation between each us... +0.61
rails postgres insert 0.00
SQL - select most 'active' time from db +0.01
retrieve rows of 1st column based on common data on 2nd column -0.70
SQL - Select most 'active' timespan fromdb 0.00
Foreign Keys Relation - Unique tuple +0.51
Best way to use PostgreSQL full text search ranking +2.23
Efficiently querying a huge time series table for one row every 15... +2.73
Simple MySQL query with performance issues -0.91
Order BY turns a 30ms query into a 7120ms query. Known performance... -0.88
How to write Postgres query when filtering a column based on two co... +0.45
mysql select from different tables with if clause +0.53
An expression of non-boolean type specified in a context where a co... +0.58
creating new table error +0.01
How to include null values in `tablefunc` query in postgresql? +0.84
SQL How to effectively use dynamic sql query when output COLUMN ord... +0.21
Insert distinct data into a new table using select and calculate su... 0.00
MySQL query painfully slow on large data -1.17
Double select narrow results 0.00
Error in NULLIF()? -0.96
How to write a PHP + MySQL web service to perform 1000 requests (IN... -0.00
2 counts in same query but different conditions 0.00
mySQL Query count, select three tables 0.00
How to generate a new code -2.12
Count SQL Statement Without Create Other View +0.52
MySql. One column, two different data types, multiple where query 0.00
Select a maximum of 2 rows where a column has the same value +1.08