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Error renaming a column in MySQL
How do I rename a column in table xyz ? The columns are:
9 Answers
9
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Count table rows
What is the MySQL command to retrieve the count of records in a table?
11 Answers
11
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How do I check in SQLite whether a table exists?
How do I, reliably , check in SQLite, whether a particular user table exists?
22 Answers
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What's the difference between echo, print, and print_r in PHP?
...ing
No return value
var_export()
Outputs a human-readable and PHP-executable representation of any one value
Accepts not just strings but other types including arrays and objects, formatting them to be readable
Uses a different output format to both print_r() and var_dump() - resulting output is...
Rails: Using build with a has_one association in rails
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Supposedly if user belonged to profile(meaning user table has foreign_key profile_id in its table) then also building profile for user will work as mentioned above i.e but for new action only user.build_profile for edit user.build_profile if user.profile.nil? and if you w...
Delete duplicate records in SQL Server?
Consider a column named EmployeeName table Employee . The goal is to delete repeated records, based on the EmployeeName field.
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How to Vertical align elements in a div?
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This also works with inline-block and table-cell elements. If you are having issues with this, try adjusting line-height of the container element (i.e. context) since it is used in the vertical-align line box calculations.
– Alex W
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SQL variable to hold list of integers
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Table variable
declare @listOfIDs table (id int);
insert @listOfIDs(id) values(1),(2),(3);
select *
from TabA
where TabA.ID in (select id from @listOfIDs)
or
declare @listOfIDs varchar(1000);
SET @listOfIDs = ',1,2,3...
How do I restore a dump file from mysqldump?
...mmand prompt (in Windows) and cd to the directory where the mysql.exe executable is (you may have to look around a bit for it, it'll depend on how you installed mysql, i.e. standalone or as part of a package like WAMP). Once you're in that directory, you should be able to just type the command as I...
Is there a way to get a collection of all the Models in your Rails app?
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ActiveRecord::Base.connection.tables.map do |model|
model.capitalize.singularize.camelize
end
will return
["Article", "MenuItem", "Post", "ZebraStripePerson"]
Additional information If you want to call a method on the object name without model:stri...