大约有 16,000 项符合查询结果（耗时：0.0189秒） [XML]
List of foreign keys and the tables they reference
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Here is an another solution. Using sys's default views are so slow (approx 10s in my situation). This is much faster than that (approx. 0.5s).
SELECT
CONST.NAME AS CONSTRAINT_NAME,
RCONST.NAME AS REF_CONSTRAINT_NAME,
OBJ.NAME AS TABLE_NAME,
C...
Check if table exists in SQL Server
... was wondering why you would use OBJECT_ID vs INFORMATION_SCHEMA.TABLES vs sys.tables. Pointing out that INFORMATION_SCHEMA is part of a standard pretty much answers that question. BTW it's funny, one of our Database experts that I was going to ask this question has the same last name as you, must b...
Simple argparse example wanted: 1 argument, 3 results
...attr(args, 'foo-bar'))
The thing that threw me off is that argparse will convert the named argument "--foo-bar" into "foo_bar", but a positional parameter named "foo-bar" stays as "foo-bar", making it less obvious how to use it in your program.
Notice the two lines near the end of my example -- ...
Find the number of columns in a table
...=st.executeQuery(quer);
ResultSetMetaData rsmd = rs.getMetaData();
int NumOfCol=0;
NumOfCol=rsmd.getColumnCount();
System.out.println("Query Executed!! No of Colm="+NumOfCol);
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Reading binary file and looping over each byte
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@usr: Well the file objects are buffered internally, and even so this is what was asked for. Not every script needs optimal performance.
– Skurmedel
Jul 8 '12 at 19:12
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Output to the same line overwriting previous output?
...rsor to the start of the current line. Thus, there's no need to import the sys module for this sort of simple usage. print() actually has a number of keyword arguments which can be used to greatly simplify code.
To use the same code on Python 2.6+, put the following line at the top of the file:
fr...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...bin/head -v -n 2 /proc/stat /proc/version /proc/uptime /proc/loadavg /proc/sys/fs/file-nr /proc/sys/kernel/hostname
0.998 tail 12103 6578 0 /usr/bin/tail -v -n 16 /proc/net/dev
1.000 df 12104 6578 0 /usr/bin/df
1.002 who 12105 6578 0 /us...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...bin/head -v -n 2 /proc/stat /proc/version /proc/uptime /proc/loadavg /proc/sys/fs/file-nr /proc/sys/kernel/hostname
0.998 tail 12103 6578 0 /usr/bin/tail -v -n 16 /proc/net/dev
1.000 df 12104 6578 0 /usr/bin/df
1.002 who 12105 6578 0 /us...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
...bin/head -v -n 2 /proc/stat /proc/version /proc/uptime /proc/loadavg /proc/sys/fs/file-nr /proc/sys/kernel/hostname
0.998 tail 12103 6578 0 /usr/bin/tail -v -n 16 /proc/net/dev
1.000 df 12104 6578 0 /usr/bin/df
1.002 who 12105 6578 0 /us...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...bin/head -v -n 2 /proc/stat /proc/version /proc/uptime /proc/loadavg /proc/sys/fs/file-nr /proc/sys/kernel/hostname
0.998 tail 12103 6578 0 /usr/bin/tail -v -n 16 /proc/net/dev
1.000 df 12104 6578 0 /usr/bin/df
1.002 who 12105 6578 0 /us...