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Stack Exchange

ypercubeᵀᴹ

Athens, Greece and London, UK

http://in.another.dimension

Interests: math, programming and games, not necessarily in that order.

Favourite numbers: Surreals

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Top Questions
Top Answers
275
MySQL COUNT DISTINCT
stackoverflow.com

193
Does the join order matter in SQL?
stackoverflow.com

184
Sql Server 'Saving changes is not permitted' error ► Prevent saving changes that require table re-creation
stackoverflow.com

183
MySQL IF NOT NULL, then display 1, else display 0
stackoverflow.com

144
What are the mathematical/computational principles behind this game?
stackoverflow.com

137
Good explanation of cascade (ON DELETE/UPDATE) behavior
dba.stackexchange.com

103
MySQL date formats - difficulty Inserting a date
stackoverflow.com

99
How to use SQL Select statement with IF EXISTS sub query?
stackoverflow.com

98
must appear in the GROUP BY clause or be used in an aggregate function
stackoverflow.com

96
SQL: set existing column as Primary Key in MySQL
stackoverflow.com

80
Using IS NULL or IS NOT NULL on join conditions - Theory question
stackoverflow.com

75
mysql “Where not in” using two columns
stackoverflow.com

75
row-level trigger vs statement-level trigger
stackoverflow.com

71
Graph auto-layout algorithm
stackoverflow.com

69
What is the maximum size of int(10) in Mysql
stackoverflow.com

66
Format date in MySQL SELECT as ISO 8601
stackoverflow.com

64
Sorting by date & time in descending order?
stackoverflow.com

61
Why does this query work?
dba.stackexchange.com

60
How do I insert a row which contains a foreign key?
dba.stackexchange.com

56
MySQL sort by some list
stackoverflow.com

51
How to limit maximum number of rows in a table to just 1
dba.stackexchange.com

50
CHECK constraint in MySQL is not working
stackoverflow.com

49
How to select rows that have current day's timestamp?
stackoverflow.com

47
MySQL: #1075 - Incorrect table definition; autoincrement vs another key?
stackoverflow.com

46
How to select specific rows if a column exists or all rows if a column doesn't
dba.stackexchange.com

45
How to correctly do upsert in postgres 9.5
stackoverflow.com

45
How to combine date and time to datetime2 in SQL Server?
dba.stackexchange.com

42
In SQL, is it OK for two tables to refer to each other?
stackoverflow.com

42
EXISTS (SELECT 1 …) vs EXISTS (SELECT * …) One or the other?
dba.stackexchange.com

40
Using 'case expression column' in where clause
stackoverflow.com

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