大约有 41,000 项符合查询结果（耗时：0.0283秒） [XML]
Removing duplicate values from a PowerShell array
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Use Select-Object (whose alias is select) with the -Unique switch; e.g.:
$a = @(1,2,3,4,5,5,6,7,8,9,0,0)
$a = $a | select -Unique
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SQLAlchemy IN clause
...3,456))).all()
edit: Without the ORM, it would be
session.execute(
select(
[MyUserTable.c.id, MyUserTable.c.name],
MyUserTable.c.id.in_((123, 456))
)
).fetchall()
select() takes two parameters, the first one is a list of fields to retrieve, the second one is the where ...
Python argparse ignore unrecognised arguments
...r "recognized" arguments instead.
parser = argparse.ArgumentParser(prefix_chars='+')
parser.add_argument('+cd')
The same command will produce
Namespace(_unrecognized_args=['--foo', 'BAR', 'a', 'b'], cd='e')
Put that in your pipe and smoke it =)
nJoy!
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Dynamic Sorting within SQL Stored Procedures
...eing duplicated twice in the order by, and is a little more readable IMO:
SELECT
s.*
FROM
(SELECT
CASE @SortCol1
WHEN 'Foo' THEN t.Foo
WHEN 'Bar' THEN t.Bar
ELSE null
END as SortCol1,
CASE @SortCol2
WHEN 'Foo' THEN t.Foo
WHEN 'Bar' THEN t.Bar
ELSE...
How do you kill all current connections to a SQL Server 2005 database?
...problems ALTER DATABASE aspnetdb SET SINGLE_USER WITH ROLLBACK IMMEDIATE select GETDATE() ALTER DATABASE aspnetdb SET MULTI_USER what do you have instead of the commented out code?
– SQLMenace
Aug 17 '10 at 18:33
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python-pandas and databases like mysql
...a_conn = cx_Oracle.connect('your_connection_string')
df_ora = pd.read_sql('select * from user_objects', con=ora_conn)
print 'loaded dataframe from Oracle. # Records: ', len(df_ora)
ora_conn.close()
And here is the equivalent example for MySQLdb:
import MySQLdb
mysql_cn= MySQLdb.connect(host='...
In Vim is there a way to delete without putting text in the register?
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Any ideas on doing this selectively on only empty lines? (If I dd on an empty line it goes into the blackhole, otherwise it dds like normal).
– Jonathan Dumaine
Mar 5 '13 at 23:28
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How to set OnClickListener on a RadioButton in Android?
...oGroup group, int checkedId) {
// checkedId is the RadioButton selected
}
});
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“Inspect” a hover element?
...if this is just a problem on my PC or not, but I can't see the menu option selected via keyboard and the shortcut key (ctrl-shift-I) doesn't work while the dropdown menu is visible, so since inspect element is the last option on the dropdown, I used up-arrow key to wrap-around to the last item and h...
Return number of rows affected by UPDATE statements
...NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
DECLARE @RowCount1 INTEGER
DECLARE @RowCount2 INTEGER
DECLARE @RowCount3 INTEGER
DECLARE @RowCount4 INTEGER
UPDATE Table1 Set Column = 0 WHERE Column IS NULL
SEL...