大约有 3,558 项符合查询结果（耗时：0.0200秒） [XML]
How can i query for null values in entity framework?
...
Workaround for Linq-to-SQL:
var result = from entry in table
where entry.something.Equals(value)
select entry;
Workaround for Linq-to-Entities (ouch!):
var result = from entry in table
where (value == null...
How to Concatenate Numbers and Strings to Format Numbers in T-SQL?
...convert your parameters to VARCHAR before trying to concatenate them. When SQL Server sees @my_int + 'X' it thinks you're trying to add the number "X" to @my_int and it can't do that. Instead try:
SET @ActualWeightDIMS =
CAST(@Actual_Dims_Lenght AS VARCHAR(16)) + 'x' +
CAST(@Actual_Dims_W...
Errors: “INSERT EXEC statement cannot be nested.” and “Cannot use the ROLLBACK statement within an I
...ng to 'bubble' up data from a chain of stored procedures. A restriction in SQL Server is you can only have one INSERT-EXEC active at a time. I recommend looking at How to Share Data Between Stored Procedures which is a very thorough article on patterns to work around this type of problem.
For examp...
Can PHP PDO Statements accept the table or column name as parameter?
... case 1:
$tbl = 'users';
break;
}
$sql = "SELECT * FROM $tbl";
}
By leaving no default case or using a default case that returns an error message you ensure that only values that you want used get used.
...
Execute SQLite script
I start up sqlite3 version 3.7.7, unix 11.4.2 using this command:
5 Answers
5
...
Comparing Dates in Oracle SQL
...stead of a date literal: timestamp '2015-01-30 19:42:04' (because in ANSI SQL a the date data type doesn't have a time, only the timestamp data type does).
– a_horse_with_no_name
Feb 3 '15 at 22:27
...
How do I get list of all tables in a database using TSQL?
...e best way to get the names of all of the tables in a specific database on SQL Server?
17 Answers
...
When restoring a backup, how do I disconnect all active connections?
My SQL Server 2005 doesn't restore a backup because of active connections. How can I force it?
10 Answers
...
Why can't a text column have a default value in MySQL?
...u try to create a TEXT column on a table, and give it a default value in MySQL, you get an error (on Windows at least). I cannot see any reason why a text column should not have a default value. No explanation is given by the MySQL documentation. It seems illogical to me (and somewhat frustrating, a...
INSERT statement conflicted with the FOREIGN KEY constraint - SQL Server
...s not also in the primary key column of the referenced table.
If you have SQL Server Management Studio, open it up and sp_help 'dbo.Sup_Item_Cat'. See which column that FK is on, and which column of which table it references. You're inserting some bad data.
Let me know if you need anything explain...