大约有 43,000 项符合查询结果（耗时：0.0237秒） [XML]
Remove leading or trailing spaces in an entire column of data
...HAR(160) directly without a workaround formula by
Edit .... Replace your selected data,
in Find What hold ALT and type 0160 using the numeric keypad
Leave Replace With as blank and select Replace All
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How do you count the number of occurrences of a certain substring in a SQL varchar?
...mparing the lengths
Declare @string varchar(1000)
Set @string = 'a,b,c,d'
select len(@string) - len(replace(@string, ',', ''))
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Generating Random Passwords
...axValue is not evenly divisible by characterArray.Length then the randomly selected characters will not be evenly distributed (though this will be a very small effect).
– Jeff Walker Code Ranger
Aug 19 '14 at 17:24
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Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
...rate through for i up to n, doing two things: pressing A once and pressing select all + copy followed by paste j times (actually j-i-1 below; note the trick here: the contents are still in the clipboard, so we can paste it multiple times without copying each time). We only have to consider up to 4 c...
SQL NVARCHAR and VARCHAR Limits
... large (unavoidable) dynamic SQL query. Due to the number of fields in the selection criteria the string containing the dynamic SQL is growing over 4000 chars. Now, I understand that there is a 4000 max set for NVARCHAR(MAX) , but looking at the executed SQL in Server Profiler for the statement
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Generate random password string with requirements in javascript
...ough bits to "fill up" the full decimal space, the last digit will only be selected from a certain set of values. For example, on my computer, the last digit is only ever "i", "r", and "9". Use this instead: Math.random().toString(36).substr(2, 8)
– Joel
Jan 19...
What is the maximum length of a table name in Oracle?
...ith standard SQL you can also determine the lengths by querying the table: select * from all_tab_columns where table_name = 'ALL_TAB_COLUMNS';
– JustinKSU
Mar 11 '16 at 23:18
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Why does Oracle 9i treat an empty string as NULL?
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@sehe the confusing bit for me is select 1 from dual where ('' is null)
– matt freake
Aug 22 '13 at 15:58
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How well is Unicode supported in C++11?
...port is quite good, though: it supports detecting endianess from a BOM, or selecting it explicitly in code. It also supports producing output with and without a BOM.
There are some more interesting conversion possibilities absent. There is no way to deserialize from an UTF-16 byte stream or string ...
Query to list number of records in each table in a database
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If you're using SQL Server 2005 and up, you can also use this:
SELECT
t.NAME AS TableName,
i.name as indexName,
p.[Rows],
sum(a.total_pages) as TotalPages,
sum(a.used_pages) as UsedPages,
sum(a.data_pages) as DataPages,
(sum(a.total_pages) * 8) / 1024 as To...