大约有 40,000 项符合查询结果（耗时：0.0340秒） [XML]
How to see log files in MySQL?
...print the value of error log, run this command in the terminal:
mysql -e "SELECT @@GLOBAL.log_error"
To read content of the error log file in real time, run:
sudo tail -f $(mysql -Nse "SELECT @@GLOBAL.log_error")
Note: Hit Control-C when finish
When general log is enabled, try:
sudo tail -f ...
How to set conditional breakpoints in Visual Studio?
...t a breakpoint.
Right-Click over the breakpoint, and in the popup menu you select an option that suites you.
These options are as follows:
You can set a condition, based on a code expression that you supply (select Condition from the popup menu). For instance, you can specify that foo == 8 or s...
Add shadow to custom shape on Android
...;/shape>
</item>
</layer-list>
Then you should have a selector with diferent versions of the button, something like:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawabl...
Sorting rows in a data table
...
Its Simple Use .Select function.
DataRow[] foundRows=table.Select("Date = '1/31/1979' or OrderID = 2", "CompanyName ASC");
DataTable dt = foundRows.CopyToDataTable();
And it's done......Happy Coding
...
How to combine date from one field with time from another field - MS SQL Server
...ro (base date: January 1, 1900)
Adding them returns the correct result.
SELECT Combined = MyDate + MyTime FROM MyTable
Rationale (kudos to ErikE/dnolan)
It works like this due to the way the date is stored as two 4-byte
Integers with the left 4-bytes being the date and the right
4-bytes...
What should every developer know about databases? [closed]
...fluence that choice;
The concept of coverage (why you shouldn't just write SELECT *);
The difference between a clustered and non-clustered index;
Why more/bigger indexes are not necessarily better;
Why you should try to avoid wrapping filter columns in functions.
Designers should also be aware of ...
android get real path by Uri.getPath()
...
This is what I do:
Uri selectedImageURI = data.getData();
imageFile = new File(getRealPathFromURI(selectedImageURI));
and:
private String getRealPathFromURI(Uri contentURI) {
String result;
Cursor cursor = getContentResolver().query(cont...
How can I clone an SQL Server database on the same server in SQL Server 2008 Express?
...is optional.
Click to clone database and open restore dialog (see image)
Select Device and add the backup file from step 3.
Change destination to test database
Change location of database files, it must be different from the original. You can type directly into text box, just add postfix. (NOTE:...
How to fix “Incorrect string value” errors?
...ify that the tables where the data is stored have the utf8 character set:
SELECT
`tables`.`TABLE_NAME`,
`collations`.`character_set_name`
FROM
`information_schema`.`TABLES` AS `tables`,
`information_schema`.`COLLATION_CHARACTER_SET_APPLICABILITY` AS `collations`
WHERE
`tables`.`table_sche...
Declare variable in table valued function
...
There are two flavors of table valued functions. One that is just a select statement and one that can have more rows than just a select statement.
This can not have a variable:
create function Func() returns table
as
return
select 10 as ColName
You have to do like this instead:
create fu...