大约有 25,400 项符合查询结果（耗时：0.0277秒） [XML]
Which SQL query is faster? Filter on Join criteria or Where clause?
...width=8) (actual time=0.017..0.017 rows=1 loops=1)
Buckets: 1024 Batches: 1 Memory Usage: 9kB
-> Seq Scan on result r (cost=0.00..27.00 rows=7 width=8) (actual time=0.006..0.008 rows=1 loops=1)
Filter: (team_2_score = 24)
Rows Removed by Filter:...
Export and Import all MySQL databases at one time
...skip root password.
dbs=$(sudo mysql --defaults-extra-file=/root/.my.cnf --batch --skip-column-names -e "SHOW DATABASES;" | grep -E -v "(information|performance)_schema")
# Create temporary directory with "-d" option
tmp=$(mktemp -d)
# Set output dir here. /var/backups/ is used by system,
# so inte...
What are the best use cases for Akka framework [closed]
... the jars to your existing JVM project (use Scala,
Java, Groovy or JRuby)
Batch processing ( any industry )
Camel integration to hook up with batch data sources
Actors divide and conquer the batch workloads
Communications hub ( telecom, web media, mobile media )
scale up, scale out, fault-tolera...
How to wait for a keypress in R?
...o any key press (not just enter), and even works when the script is run in batch mode (but it still pauses in batch mode, so if you are not there to continue it it will wait forever). A timer could be added to make it continue after a set amount of time if not clicked or has a key pressed.
It does...
How do I create a SQL table under a different schema?
...dated to note SQL Server 11.03 requiring this be the only statement in the batch.
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Is there a command like “watch” or “inotifywait” on the Mac?
...c links.
-n, --numeric Print a numeric event mask.
-o, --one-per-batch Print a single message with the number of change events.
in the current batch.
-p, --poll Use the poll monitor.
-r, --recursive Recurse subdirectories.
-t, --timestamp ...
Get Folder Size from Windows Command Line
...
You can just add up sizes recursively (the following is a batch file):
@echo off
set size=0
for /r %%x in (folder\*) do set /a size+=%%~zx
echo %size% Bytes
However, this has several problems because cmd is limited to 32-bit signed integer arithmetic. So it will get sizes above 2 G...
Setting transparent images background in IrfanView
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If you are using the batch conversion, in the window click "options" in the "Batch conversion settings-output format" and tick the two boxes "save transparent color" (one under "PNG" and the other under "ICO").
...
How to edit log message already committed in Subversion?
...ctory cannot be used as they are Unix-specific. You need to copy a Windows batch file pre-revprop-change.bat to the hooks directory, e.g. the one provided here.
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Command not found error in Bash variable assignment
... This is funny, though, as set foo = bar is a common mistake in Windows batch files as well—and there the batch language is ridiculed for it ;-)
– Joey
Feb 15 '10 at 18:36
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