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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
297
MySQL COUNT DISTINCT
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222
Does the join order matter in SQL?
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206
MySQL IF NOT NULL, then display 1, else display 0
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204
Sql Server 'Saving changes is not permitted' error ► Prevent saving changes that require table re-creation
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166
Good explanation of cascade (ON DELETE/UPDATE) behavior
dba.stackexchange.com

148
What are the mathematical/computational principles behind this game?
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125
must appear in the GROUP BY clause or be used in an aggregate function
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118
How to use SQL Select statement with IF EXISTS sub query?
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117
MySQL date formats - difficulty Inserting a date
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113
SQL: set existing column as Primary Key in MySQL
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87
Using IS NULL or IS NOT NULL on join conditions - Theory question
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83
Format date in MySQL SELECT as ISO 8601
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83
mysql “Where not in” using two columns
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81
Graph auto-layout algorithm
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78
What is the maximum size of int(10) in Mysql
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77
How do I insert a row which contains a foreign key?
dba.stackexchange.com

76
row-level trigger vs statement-level trigger
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68
Sorting by date & time in descending order?
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61
MySQL sort by some list
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61
Why does this query work?
dba.stackexchange.com

57
How to correctly do upsert in postgres 9.5
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54
MySQL: #1075 - Incorrect table definition; autoincrement vs another key?
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53
How to combine date and time to datetime2 in SQL Server?
dba.stackexchange.com

53
How to select rows that have current day's timestamp?
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53
How to limit maximum number of rows in a table to just 1
dba.stackexchange.com

52
selecting where two columns are in a set
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52
CHECK constraint in MySQL is not working
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51
How to select specific rows if a column exists or all rows if a column doesn't
dba.stackexchange.com

50
EXISTS (SELECT 1 …) vs EXISTS (SELECT * …) One or the other?
dba.stackexchange.com

48
In SQL, is it OK for two tables to refer to each other?
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