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Struct Constructor in C++?
...wever I think he's having a compile issue. The issue might be because of a union that is using the struct. You can't have non-trivial constructors in the type you have in a union.
– Chap
Jul 14 '09 at 20:18
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Select mySQL based only on month and year
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SELECT * FROM projects WHERE YEAR(Date) = 2011 AND MONTH(Date) = 5
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Using backticks around field names
...backticks, I would assume it lets you get away with ridiculous stuff like
SELECT `id`, `my name`, `another field` , `field,with,comma`
Which does of course generate badly named tables.
If you're just being concise I don't see a problem with it,
you'll note if you run your query as such
EXPLA...
Why there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT clause?
...pdated) values(null, null);
Query OK, 1 row affected (0.06 sec)
mysql> select * from t5;
+----+---------------------+---------------------+
| id | stamp_created | stamp_updated |
+----+---------------------+---------------------+
| 2 | 2009-04-30 09:44:35 | 2009-04-30 09:44:35 |
+...
Return 0 if field is null in MySQL
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Would that be IFNULL((SELECT SUM(uop.price * uop.qty) FROM uc_order_products uop WHERE uo.order_id = uop.order_id) AS products_subtotal, 0)?
– Kevin
Oct 22 '10 at 13:46
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Reading 64bit Registry from a 32bit application
...ubKey(registryKey);
if (key != null)
{
var list = key.GetSubKeyNames().Select(keyName => key.OpenSubKey(keyName).GetValue("DisplayName")).ToList();
key.Close();
}
For 32 registers is:
registryKey = @"SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall";
key = Registry.Loca...
When should I use a composite index?
...nefit a query that uses those fields for joining, filtering, and sometimes selecting. It will also benefit queries that use left-most subsets of columns in that composite. So the above index will also satisfy queries that need
index( column_A, column_B, column_C )
index( column_A, column_B )
index(...
MySQL combine two columns into one column
...does not start with a digit, then the converted value is 0.
So try this:
select concat(column1, column2)
Two ways to add a space:
select concat(column1, ' ', column2)
select concat_ws(' ', column1, column2)
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Get query from java.sql.PreparedStatement [duplicate]
...ut from above code.
Before : com.mysql.jdbc.JDBC4PreparedStatement@fa9cf: SELECT * FROM test WHERE blah1=** NOT SPECIFIED ** and blah2=** NOT SPECIFIED **
After : com.mysql.jdbc.JDBC4PreparedStatement@fa9cf: SELECT * FROM test WHERE blah1='Hello' and blah2='World'
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Export Data from mysql Workbench 6.0
...MYSQLWorkbench.app/Contents/Resources/plugins - right click on the app and select Show Package contents to get inside the app (thanks to Bradley Flood)
c) Linux Ubuntu: /usr/lib/mysql-workbench/modules (thanks to Alessandro Lopes)
Open file wb_admin_export_options.py
Find line "delayed-insert":["Wr...