大约有 15,000 项符合查询结果（耗时：0.0248秒） [XML]
How to check Oracle database for long running queries
...
This one shows SQL that is currently "ACTIVE":-
select S.USERNAME, s.sid, s.osuser, t.sql_id, sql_text
from v$sqltext_with_newlines t,V$SESSION s
where t.address =s.sql_address
and t.hash_value = s.sql_hash_value
and s.status = 'ACTIVE'
and s.username <> 'SYSTEM'
ord...
Is a colon `:` safe for friendly-URL use?
...".", "-", "*", and
"_" remain the same.
The space
character " " is converted into a plus
sign "+".
All other characters are
unsafe and are first converted into
one or more bytes using some encoding
scheme. Then each byte is represented
by the 3-character string "%xy", where
xy ...
File to byte[] in Java
How do I convert a java.io.File to a byte[] ?
25 Answers
25
...
Count the number of occurrences of a string in a VARCHAR field?
...
This should do the trick:
SELECT
title,
description,
ROUND (
(
LENGTH(description)
- LENGTH( REPLACE ( description, "value", "") )
) / LENGTH("value")
) AS count
FROM <tab...
How do you beta test an iphone app?
...file
Start the Mac OS utility program Keychain Access.
In its main menu, select Keychain Access / Certificate Assistant / Request a Certificate From a Certificate Authority...
The dialog that pops up should aready have your email and name it it.
Select the radio button Saved to disk and Continue....
Passing variable arguments to another function that accepts a variable argument list
...hat takes a variable argument list with , ... in the signature. If you've converted the variable arguments to a va_list, you can pass the va_list to another function that only takes a va_list, but that function (or one that it calls) must have some way of knowing what's in the va_list.
...
Can you add new statements to Python's syntax?
...hon uses a custom parser generator named pgen. This is a LL(1) parser that converts Python source code into a parse tree. The input to the parser generator is the file Grammar/Grammar[1]. This is a simple text file that specifies the grammar of Python.
[1]: From here on, references to files in the ...
Why Android Studio says “Waiting For Debugger” if am NOT debugging?
...e. Just go to "Android device"->"Settings"->"Developer Options"->"Select app to be debugged". It will likely be pointing to your application. Just select the option and then select "None".
Note: As mentioned, even if "None" is already selected, re-selecting "None" appears to correct the pr...
Spring JPA @Query with LIKE
...
Try to use the following approach (it works for me):
@Query("SELECT u.username FROM User u WHERE u.username LIKE CONCAT('%',:username,'%')")
List<String> findUsersWithPartOfName(@Param("username") String username);
Notice: The table name in JPQL must start with a capital letter...
Python SQL query string formatting
...qualified a somewhere between Option 2 and Option 4
Code Sample:
sql = ("SELECT field1, field2, field3, field4 "
"FROM table "
"WHERE condition1=1 "
"AND condition2=2;")
Works as well with f-strings:
fields = "field1, field2, field3, field4"
table = "table"
conditions = "co...