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What is the difference between ExecuteScalar, ExecuteReader and ExecuteNonQuery?
...at are the different cases when we use these three? Where should I use one and where should I not?
9 Answers
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SQLiteDatabase.query method
...By using the Where/Bind -Args version you get automatically escaped values and you don't have to worry if input-data contains '.
Unsafe: String whereClause = "column1='" + value + "'";
Safe: String whereClause = "column1=?";
because if value contains a ' your statement either breaks and you get ex...
How can I tell if one commit is a descendant of another commit?
... --verify B (then B is reachable from A). git rev-parse is here needed to convert from commit name to commit SHA-1 / commit id.
Using git rev-list like in VonC answer is also possibility.
Edit: in modern Git there is explicit support for this query in the form of git merge-base --is-ancestor.
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How do I delete NuGet packages that are not referenced by any project in my solution?
...lace. That's one of the main benefits of using package restore. As part of converting to package restore, an 'ignore' rule should be placed on the packages folder.
– Carl Bussema
May 13 '14 at 15:23
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Dynamically generating a QR code with PHP [closed]
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but how to convert it into mvc standard any ideas !!!!
– saurabh kamble
Jun 19 '14 at 10:52
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Is it possible to style a select box? [closed]
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I've seen some jQuery plugins out there that convert <select>'s to <ol>'s and <option>'s to <li>'s, so that you can style it with CSS. Couldn't be too hard to roll your own.
Here's one: https://gist.github.com/1139558 (Used to he here, but it lo...
How do I delete from multiple tables using INNER JOIN in SQL server
...table.
As a side note, you can also do inserted.* on an insert statement, and both inserted.* and deleted.* on an update statement.
EDIT:
Also, have you considered adding a trigger on table1 to delete from table2 + 3? You'll be inside of an implicit transaction, and will also have the "inserted." ...
What is the difference between decodeURIComponent and decodeURI?
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encodeURIComponent()
Converts the input into a URL-encoded
string
encodeURI()
URL-encodes the input, but
assumes a full URL is given, so
returns a valid URL by not encoding
the protocol (e.g. http://) and
host name (e.g.
ww...
How can I check if multiplying two numbers in Java will cause an overflow?
I want to handle the special case where multiplying two numbers together causes an overflow. The code looks something like this:
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SQL Joins Vs SQL Subqueries (Performance)?
...frastructure. We have a kind of query optimization engine underneath which converts the IN (...) clauses to join (if it was possible). But when you have a Group by on a well indexed column (based on its cardinality) then it will be much faster. So it really depends on the situation.
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