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python list in sql query as parameter
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Answers so far have been templating the values into a plain SQL string. That's absolutely fine for integers, but if we wanted to do it for strings we get the escaping issue.
Here's a variant using a parameterised query that would work for both:
placeholder= '?' # For SQLite. See DBAPI p...
Which is faster/best? SELECT * or SELECT column1, colum2, column3, etc
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Aha so by using * you are adding extra work for the DB. Ok that's one reason I hadn't thought of.
– Ankur
Jun 4 '10 at 6:50
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Is the LIKE operator case-sensitive with MSSQL Server?
...objects.
It is also possible to change a column collation on the fly for string comparison, but this is highly unrecommended in a production environment because it is extremely costly.
select
column1 collate sql_latin1_general_cp1_ci_as as column1
from table1
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How do I execute inserts and updates in an Alembic upgrade script?
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id = sa.Column(sa.Integer, primary_key=True)
name = sa.Column(sa.String, nullable=False)
team_name = sa.Column('team', sa.String, nullable=False)
team_id = sa.Column(sa.Integer, sa.ForeignKey('teams.id'), nullable=False)
team = orm.relationship('Team', backref='players')
cla...
Get an OutputStream into a String
What's the best way to pipe the output from an java.io.OutputStream to a String in Java?
5 Answers
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What is the easiest way to parse an INI file in Java?
... Neat! I've always just been using BufferedReader and a bit of copy/paste String parsing code to not have to add yet another dependency to my applications (that can blow out of proportions when you start to add in third party APIs for even the simplest tasks). But I can't ignore this kind of simpli...
MySQL Query GROUP BY day / month / year
...ion when grouping will be faster than DATE_FORMAT function (which return a string value). Try using function|field that return non-string value for SQL comparison condition (WHERE, HAVING, ORDER BY, GROUP BY).
share
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How do I calculate the date in JavaScript three months prior to today?
...pet:
var d = new Date("January 14, 2012");
console.log(d.toLocaleDateString());
d.setMonth(d.getMonth() - 3);
console.log(d.toLocaleDateString());
There are some caveats...
A month is a curious thing. How do you define 1 month? 30 days? Most people will say that one month ago me...
Encrypt and decrypt a string in C#?
How can I encrypt and decrypt a string in C#?
29 Answers
29
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How do I get a raw, compiled SQL query from a SQLAlchemy expression?
...as the caveats that it is only supported for basic types, such as ints and strings, and furthermore if a bindparam() without a pre-set value is used directly, it won’t be able to stringify that either.
The documentation also issues this warning:
Never use this technique with string content r...