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What are the disadvantages of using persistent connection in PDO
... It's been resolved by proxy, I suppose. The answer below with regard to mysqli_change_user is still probably the best workaround for people that have to do persistent connections in an application not designed to deal with state problems.
– Charles
Feb 25 '1...
SQL statement to get column type
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If you're using MySQL you could try
SHOW COLUMNS FROM `tbl_name`;
SHOW COLUMNS on dev.mysql.com
Otherwise you should be able to do
DESCRIBE `tbl_name`;
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selecting unique values from a column
I have a MySQL table which contains the following type of information:
9 Answers
9
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If table exists drop table then create it, if it does not exist just create it
...ROP TABLE IF EXISTS `foo`;
CREATE TABLE `foo` ( ... );
Try searching the MySQL documentation first if you have any other problems.
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How to generate .json file with PHP?
...t * from Posts limit 20";
$response = array();
$posts = array();
$result=mysql_query($sql);
while($row=mysql_fetch_array($result)) {
$title=$row['title'];
$url=$row['url'];
$posts[] = array('title'=> $title, 'url'=> $url);
}
$response['posts'] = $posts;
$fp = fopen('results.json...
What is __init__.py for?
...ABASE URL'? I tried to replicate this by enclosing the create_engine with 'mysql+mysqldb://root:python@localhost:3306/test' but it does not work. Thanks.
– SunnyBoiz
Jun 25 '19 at 13:34
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SQL update query using joins
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FYI this will NOT work in MySQL (different syntax)! For MySQL have a look at gcbenison's answer
– Sliq
Jan 17 '17 at 16:28
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How can I use UUIDs in SQLAlchemy?
...nally got it solid.
from sqlalchemy import types
from sqlalchemy.dialects.mysql.base import MSBinary
from sqlalchemy.schema import Column
import uuid
class UUID(types.TypeDecorator):
impl = MSBinary
def __init__(self):
self.impl.length = 16
types.TypeDecorator.__init__(sel...
SHFileOperation函数总结（文件夹的移动、复制、删除） - C/C++ - 清泛网 -...
...r.exe保存被重命名的文件,以避免文件名冲突!
上面知道了如何才能使hNameMappings有效
现在如何使用hNameMappings,及其所指的结构大小?并取得这个内存块的内容呢?
hNameMappings 是简单LPVOID无法使用loop
要使用hNameMappings，必须定义一个...
INSERT with SELECT
... lets you put whatever you inserted into another table also. I don't think MySQL has an equivalent. You might create a temporary table, select into that table, then populate courses from that table, then use the temp table for whatever else you needed.
– Andrew
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