大约有 3,620 项符合查询结果（耗时：0.0186秒） [XML]
Create a list from two object lists with linq
...dvantage is also that if you use Entity Framework, this can be done on the SQL side instead of the C# side.
– J4N
Aug 21 '13 at 7:52
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PowerShell and the -contains operator
...hers, and set automatic variables to use with captures.
-like, -ilike are SQL-like matchers.
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Nullable Foreign Key bad practice?
...ne, comparatively to other null phenomenons) is the fact that WHERE x=y in SQL actually means WHERE x is not null and y is not null and x=y, but that most programmers simply aren't aware of that fact and just read over it. Sometimes without any harm, other times not.
In fact, nullable columns viol...
How can I convert uppercase letters to lowercase in Notepad++
...rk for me (Notepad++ v6.2.3 on Windows 7). Only the Ctrl+Shift+U/Ctrl+U or SQL_Novice's answer work.
– CarLaTeX
Jan 4 '19 at 15:07
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Logging best practices [closed]
... of choice).
Sometimes having the option to insert logging statements into SQL queries can be a lifesaver in debugging situations. Such as:
-- Invoking Class: com.foocorp.foopackage.FooClass:9021
SELECT * FROM foo;
You want class-level logging. You normally don't want static instances of...
Implementing Comments and Likes in database
...ve 2 stuff tables stuff1 and stuff2...I followed this diagram but there is sql error while using this...stuff1, stuff2 are two independent tables with their independent primary keys, and action table has a column id_stuff which is referencing to these two tabels stuff1, stuff2. Now for example stuff...
add column to mysql table if it does not exist
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Note that INFORMATION_SCHEMA isn't supported in MySQL prior to 5.0. Nor are stored procedures supported prior to 5.0, so if you need to support MySQL 4.1, this solution isn't good.
One solution used by frameworks that use database migrations is to record in your database a...
Copy values from one column to another in the same table
...e name and it's surrounded by grave accent (aka back-ticks `) as this is MySQL convention to escape keywords (and TABLE is a keyword in that case).
BEWARE, that this is pretty dangerous query which will wipe everything in column test in every row of your table replacing it by the number (regardless...
Rank function in MySQL
...nd out rank of customers. Here I am adding the corresponding ANSI standard SQL query for my requirement. Please help me to convert it to MySQL .
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Is there a way to pass the DB user password into the command line tool mysqladmin?
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Just found out the answer....
mysqladmin processlist -u root -pYOURPASSWORDHERE
No space between your password and the -p
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