大约有 3,551 项符合查询结果(耗时:0.0344秒) [XML]
How to escape single quotes in MySQL
How do I insert a value in MySQL that consist of single or double quotes. i.e
16 Answers
...
How do I check if a column is empty or null in MySQL?
... some_col = ' ' (one space inserted in the string) then it works on both MySQL and Oracle, see answer of "onedaywhen". some_col = '' doesn't work on Oracle as empty strings mean NULL there.
– Johanna
May 18 '15 at 14:07
...
how to convert milliseconds to date format in android?
...er compliant with JDBC 4.2 or later. No need for strings, no need for java.sql.* classes.
Where to obtain the java.time classes?
Java SE 8, Java SE 9, and later
Built-in.
Part of the standard Java API with a bundled implementation.
Java 9 adds some minor features and fixes.
Java SE 6 and Jav...
Trimming a huge (3.5 GB) csv file to read into R
...eparated) that has a lot of detail and incomplete rows (leading Access and SQL to choke). It's county level data set broken into segments, sub-segments, and sub-sub-segments (for a total of ~200 factors) for 40 years. In short, it's huge, and it's not going to fit into memory if I try to simply read...
How to enable MySQL Query Log?
How do I enable the MySQL function that logs each SQL query statement received from clients and the time that query statement has submitted?
Can I do that in phpmyadmin or NaviCat?
How do I analyse the log?
...
How to delete from multiple tables in MySQL?
...out to an EXISTS in 99% of the cases and then there is the 1% where this MySQL syntax takes the day.
share
|
improve this answer
|
follow
|
...
Call to undefined method mysqli_stmt::get_result
...
Please read the user notes for this method:
http://php.net/manual/en/mysqli-stmt.get-result.php
It requires the mysqlnd driver... if it isn't installed on your webspace you will have to work with BIND_RESULT & FETCH!
https://secure.php.net/manual/en/mysqli-stmt.bind-result.php
https://sec...
Undo changes in entity framework entities
...entity to be reverted."
I have made tests with ObjectContext.Refresh in SQL Azure, and the "RefreshMode.StoreWins" fires a query against database for each entity and causes a performance leak. Based on microsoft documentation ():
ClientWins : Property changes made to objects in the object contex...
System.Data.SQLite Close() not releasing database file
... was. I just ended up throwing an exception when you attempted to delete a SQLite DB using my library.
Anyway, this afternoon I was looking through it all again and figured I would try and find out why it was doing that once and for all, so here is what I've found so far.
What happens when you cal...
How do I use LINQ Contains(string[]) instead of Contains(string)
...perly. As written this would work for LINQ to objects (and may be LINQ to SQL). For EF, you'd do it the other way around and construct the collection in memory as List<int> instead and skip the ToString call.
– tvanfosson
Sep 28 '11 at 12:34
...