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How do I create a parameterized SQL query? Why Should I?
...n some circles) to prevent input like this from causing damage:
';DROP TABLE bar;--
Try putting that in your fuz variable (or don't, if you value your bar table). More subtle and damaging queries are possible as well.
Here's an example of how you do parameters with Sql Server:
Public Functi...
Create an empty data.frame
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You could use read.table with an empty string for the input text as follows:
colClasses = c("Date", "character", "character")
col.names = c("Date", "File", "User")
df <- read.table(text = "",
colClasses = colClasses,
...
How do I use an INSERT statement's OUTPUT clause to get the identity value?
...wly inserted ID being output to the SSMS console like this:
INSERT INTO MyTable(Name, Address, PhoneNo)
OUTPUT INSERTED.ID
VALUES ('Yatrix', '1234 Address Stuff', '1112223333')
You can use this also from e.g. C#, when you need to get the ID back to your calling app - just execute the SQL query wi...
How should I store GUID in MySQL tables?
...the intention of representing said value with a value mapped from a lookup table (in most cases now, UTF8). A BINARY field expects the same kind of value without any intention of representing said data from a lookup table. I used CHAR(16) back in the 4.x days because back then MySQL wasn't as good a...
Difference between Divide and Conquer Algo and Dynamic Programming
...blem is solved only once and the result of each sub-problem is stored in a table ( generally implemented as an array or a hash table) for future references. These sub-solutions may be used to obtain the original solution and the technique of storing the sub-problem solutions is known as memoization....
How to calculate percentage with a SQL statement
I have a SQL Server table that contains users & their grades. For simplicity's sake, lets just say there are 2 columns - name & grade . So a typical row would be Name: "John Doe", Grade:"A".
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How do I delete multiple rows in Entity Framework (without foreach)
I'm deleting several items from a table using Entity Framework. There isn't a foreign key / parent object so I can't handle this with OnDeleteCascade.
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How can I extract the folder path from file path in Python?
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Anyone trying to do this in the ESRI GIS Table field calculator interface can do this with the Python parser:
PathToContainingFolder =
"\\".join(!FullFilePathWithFileName!.split("\\")[0:-1])
so that
\Users\me\Desktop\New folder\file.txt
becomes
\Users\me\De...
iTerm 2: How to set keyboard shortcuts to jump to beginning/end of line?
...mment below and I'll try to add them in.
For anyone looking for the lookup table on how to convert key sequences to hex, I find this table very helpful.
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Difference between single and double quotes in Bash
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The accepted answer is great. I am making a table that helps in quick comprehension of the topic. The explanation involves a simple variable a as well as an indexed array arr.
If we set
a=apple # a simple variable
arr=(apple) # an indexed array with a single e...