database

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How to write unit tests for database calls
user_284910
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76
11
71800
integration-testing data-access-layer testing unit-testing database
Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
Kip_185110
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207
10
174053
varchar database-design database types
Rails :include vs. :joins
user_1133470
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369
8
167961
rails-activerecord join ruby-on-rails ruby database
in general, should every table in a database have an identity field to use as a PK?
user_309460
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61
10
47461
database-design sql database
Using Rails, how can I set my primary key to not be an integer-typed column?
user_2190
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87
14
85010
primary-key migration ruby-on-rails database
What is the datatype for a password in PostgreSQL?
user_549640
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81
3
97165
postgresql database types
What is the difference between CHARACTER VARYING and VARCHAR in PostgreSQL?
user_549640
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149
5
134236
varying varchar postgresql database
What is the optimal length for an email address in a database?
user_549640
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108
9
53912
database-design email database performance
What datatype to use when storing latitude and longitude data in SQL databases?
user_191120
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376
8
290076
geocoding latitude-longitude sql database
Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
user_1227920
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248
4
235750
unique-constraint indexing postgresql sql database
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