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MySQL: selecting rows where a column is null
...for a certain column, it returns an empty set. However, when I look at the table in phpMyAdmin, it says null for most of the rows.
...
EF Code First foreign key without navigation property
...public override void Up()
{
// other stuff...
AddForeignKey("ChildTableName", "ParentId", "ParentTableName", "Id",
cascadeDelete: true); // or false
CreateIndex("ChildTableName", "ParentId"); // if you want an index
}
Running this migration (update-database on package manage c...
How to get current date & time in MySQL?
...ccepted answers, I think this way is also possible:
Create your 'servers' table as following :
CREATE TABLE `servers`
(
id int(11) NOT NULL PRIMARY KEY auto_increment,
server_name varchar(45) NOT NULL,
online_status varchar(45) NOT NULL,
_exchange varchar(45) NOT NULL,
...
How to escape apostrophe (') in MySql?
...y be written as “''”.
(Also, you linked to the MySQL 5.0 version of Table 8.1. Special Character Escape Sequences, and the current version is 5.6 — but the current Table 8.1. Special Character Escape Sequences looks pretty similar.)
I think the Postgres note on the backslash_quote (string)...
How to remove/ignore :hover css style on touch devices
...e the :hover CSS does not make sense, and it can even be disturbing if a tablet triggers it on click/tap because then it might stick until the element loses focus. To be honest, I don't know why touch devices feel the need to trigger :hover in first place - but this is reality, so this problem i...
Create new user in MySQL and give it full access to one database
... - This is the command used to create users and grant rights to databases, tables, etc.
ALL PRIVILEGES - This tells it the user will have all standard privileges. This does not include the privilege to use the GRANT command however.
dbtest.* - This instructions MySQL to apply these rights for use ...
MySQL show current connection info
...7 min 16 sec
Threads: 1 Questions: 21 Slow queries: 0 Opens: 33 Flush tables: 1 Open tables: 26 Queries per second avg: 0.48
--------------
mysql>
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github markdown colspan
...
You can use HTML tables on GitHub (but not on StackOverflow)
<table>
<tr>
<td>One</td>
<td>Two</td>
</tr>
<tr>
<td colspan="2">Three</td>
</tr>
</table&...
Create the perfect JPA entity [closed]
...to create entities I find myself struggling with issues as AccessType, immutable properties, equals/hashCode, ... .
So I decided to try and find out the general best practice for each issue and write this down for personal use.
I would not mind however for anyone to comment on it or to tell me w...
Count number of records returned by group by
... count(*) RecordsPerGroup,
COUNT(*) OVER () AS TotalRecords
from temptable
group by column_1, column_2, column_3, column_4
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