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How update the _id of one MongoDB Document?
...2d2a000002")})
// set a new _id on the document
doc._id = ObjectId("4c8a331bda76c559ef000004")
// insert the document, using the new _id
db.clients.insert(doc)
// remove the document with the old _id
db.clients.remove({_id: ObjectId("4cc45467c55f4d2d2a000002")})
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How can I define a composite primary key in SQL?
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231
Just for clarification: a table can have at most one primary key. A primary key consists of one ...
Linq list of lists to single list
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answered Jul 17 '09 at 20:40
NoldorinNoldorin
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Escaping keyword-like column names in Postgres
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214
Simply enclose year in double quotes to stop it being interpreted as a keyword:
INSERT INTO ta...
Open the file in universal-newline mode using the CSV Django module
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How to use mysql JOIN without ON condition?
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155
MySQL documentation covers this topic.
Here is a synopsis. When using join or inner join, th...
Add a new line in file?
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177
Use IO#puts.
file.puts @string
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Revert the `--no-site-packages` option with virtualenv
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162
Try removing (or renaming) the file no-global-site-packages.txt in your Lib folder under your ...
Mongoose's find method with $or condition does not work properly
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215
I solved it through googling:
var ObjectId = require('mongoose').Types.ObjectId;
var objId = n...
sqlite3.ProgrammingError: Incorrect number of bindings supplied. The current statement uses 1, and t
...ach one character long.
>>> len(img)
74
>>> len((img,))
1
If you find it easier to read, you can also use a list literal:
cursor.execute('INSERT INTO images VALUES(?)', [img])
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