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How to check if a column exists in a SQL Server table?
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@MartinSmith didn't knew that, I was using your answer and came across this. Generally I use square brackets during adding columns, so I used them inside COL_LENGTH function too. My code was like this: Alter table Table_Name Add [ColumnName] NVa...
psql: FATAL: database “” does not exist
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Login as default user: sudo -i -u postgres
Create new User: createuser --interactive
When prompted for role name, enter linux username, and select Yes to superuser question.
Still logged in as postgres user, create a database: createdb <username_from_step_3>
Confirm er...
Union of dict objects in Python [duplicate]
...he binary "or" operator | has been defined to concatenate dictionaries. (A new, concrete dictionary is eagerly created):
>>> a = {"a":1}
>>> b = {"b":2}
>>> a|b
{'a': 1, 'b': 2}
Conversely, the |= augmented assignment has been implemented to mean the same as calling the...
How can prepared statements protect from SQL injection attacks?
...ed as using the prepared statement example as below.
Sqlcommand command = new sqlcommand("select * from table where username = @userinput and password=@pass");
command.Parameters.Add(new SqlParameter("@userinput", 100));
command.Parameters.Add(new SqlParameter("@pass", 100));
command.prepare();
S...
PHP MySQL Google Chart JSON - Complete Example
...unter this error either locally or on the server:
syntax error var data = new google.visualization.DataTable(<?=$jsonTable?>);
This means that their environment does not support short tags the solution is to use this instead:
<?php echo $jsonTable; ?>
And everything should work fin...
How do I update all my CPAN modules to their latest versions?
...test bugzilla-4.4.4]# cpan-outdated -p | cpanm Can't locate object method "new" via package "LWP::UserAgent" at /usr/bin/cpan-outdated line 170.
– shorif2000
Jun 5 '14 at 11:52
3
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Logcat not displaying my log calls
...in your logcat window - TOP RIGHT corner PAUSE button || (Pause receiving new logcat messages)
Few clicks + eventually restart eclipse (usually works in my case)
share
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improve this answer
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Are there any Java method ordering conventions? [closed]
...nitely wrong, because it means things are happening by "magic". A call to new Thing() should only result in a new Thing being instantiated. It should not result in database connections being opened, files being written, etc etc.
– GordonM
Apr 30 '18 at 10:07
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INSERT … ON DUPLICATE KEY (do nothing)
...es unique key or primary key, because it deletes the old entry then insert new one.
2. INSERT IGNORE
pros:
simple.
cons:
auto-increment key will not change if there is entry matches unique key or primary key but auto-increment index will increase by 1
some other errors/warnings will be i...
How to remove auto focus/keyboard popup of a field when the screen shows up?
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edited May 31 '14 at 22:51
fllo
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answered Apr 2...