大约有 3,568 项符合查询结果（耗时：0.0102秒） [XML]
Multi-statement Table Valued Function vs Inline Table Valued Function
...lued function (MSTVF) even if they both simply execute a SELECT statement. SQL Server will treat an ITVF somewhat like a VIEW in that it will calculate an execution plan using the latest statistics on the tables in question. A MSTVF is equivalent to stuffing the entire contents of your SELECT statem...
How do I add more members to my ENUM-type column in MySQL?
The MySQL reference manual does not provide a clearcut example on how to do this.
7 Answers
...
How do I check if a Sql server string is null or empty
...
In SQL Server 2012 you have IIF, e.g you can use it like
SELECT IIF(field IS NULL, 1, 0) AS IsNull
The same way you can check if field is empty.
sha...
Should MySQL have its timezone set to UTC?
...ill choose for his/her server and how he/she will store date and time.
MySQL Timezone Cheatsheet
Notes:
Changing the timezone will not change the stored datetime or
timestamp, but it will select a different datetime from
timestamp columns
Warning! UTC has leap seconds, these look like '2012-06...
C# equivalent of the IsNull() function in SQL Server
In SQL Server you can use the IsNull() function to check if a value is null, and if it is, return another value. Now I am wondering if there is anything similar in C#.
...
Is the NOLOCK (Sql Server hint) bad practice?
...cases rows are returned which do not match my query. (see blogs.msdn.com/b/sqlcat/archive/2007/02/01/… , found from another SO q'n on this topic)
– Andrew Hill
Jul 29 '15 at 1:58
...
Best way to do nested case statement logic in SQL Server
I'm writing an SQL Query, where a few of the columns returned need to be calculated depending on quite a lot of conditions.
...
mysqldump - Export structure only without autoincrement
I have a MySQL database and I am trying to find a way to export its structure only, without the auto increment values. mysqldump --no-data would almost do the job, but it keeps the auto_increment values. Is there any way to do it without using PHPMyAdmin (that I know it can do it)?
...
SQL “select where not in subquery” returns no results
...e methods in more detail:
NOT IN vs. NOT EXISTS vs. LEFT JOIN / IS NULL: SQL Server
NOT IN vs. NOT EXISTS vs. LEFT JOIN / IS NULL: PostgreSQL
NOT IN vs. NOT EXISTS vs. LEFT JOIN / IS NULL: Oracle
NOT IN vs. NOT EXISTS vs. LEFT JOIN / IS NULL: MySQL
There are three ways to do such a query:
LE...
How would you do a “not in” query with LINQ?
...ms in the first list where Email does not exist in the second list. With SQL I would just use "not in", but I do not know the equivalent in LINQ. How is that done?
...