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SQL query return data from multiple tables
...mply a color listing so that we know what colors we have in the car yard.
mysql> create table colors(id int(3) not null auto_increment primary key,
-> color varchar(15), paint varchar(10));
Query OK, 0 rows affected (0.01 sec)
mysql> show columns from colors;
+-------+-------------+-...
Is there documentation for the Rails column types?
...ded by Rails mostly for compatibility with database systems. For instance, MySQL's TIMESTAMP datatype is stored as a unix timestamp. Its valid range goes from 1970 to 2038, and the time is stored as the number of seconds that have elapsed since the last epoch, which is supposedly standard, but in pr...
How Can I Set the Default Value of a Timestamp Column to the Current Timestamp with Laravel Migratio
...e->timestamp('created_at')->useCurrent();
Back to the question, on MySQL you could also use the ON UPDATE clause through DB::raw():
$table->timestamp('updated_at')->default(DB::raw('CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP'));
Gotchas
MySQL
Starting with MySQL 5.7, 0000-00-00...
Replace Default Null Values Returned From Left Outer Join
...
If it is MySQL, IsNull should be replaced with 'IFNULL'. Thanks.
– Dhanushka
Jul 14 '14 at 6:54
...
Get difference between two lists
... 3:3}
>>> pprint(DeepDiff(t1, t2), indent=2)
{ 'type_changes': { 'root[2]': { 'newtype': <class 'str'>,
'newvalue': '2',
'oldtype': <class 'int'>,
'oldvalue': 2}}}
Value of an it...
ATL CComPtr和CComQIPtr详解 - C/C++ - 清泛网 - 专注IT技能提升
...tialize方法前，需要手动释放所有的全局或者静态变量。
如何手动释放呢：
设置指针指向NULL
调用Release方法，注意是要调用智能指针的Release方法，而不是内部指针的，指针指针的Release方法，会调用内部指针的Relase，然后设...
ATL CComPtr和CComQIPtr详解 - C/C++ - 清泛网 - 专注IT技能提升
...tialize方法前，需要手动释放所有的全局或者静态变量。
如何手动释放呢：
设置指针指向NULL
调用Release方法，注意是要调用智能指针的Release方法，而不是内部指针的，指针指针的Release方法，会调用内部指针的Relase，然后设...
ATL CComPtr和CComQIPtr详解 - C/C++ - 清泛网移动版 - 专注IT技能提升
...tialize方法前，需要手动释放所有的全局或者静态变量。
如何手动释放呢：
设置指针指向NULL
调用Release方法，注意是要调用智能指针的Release方法，而不是内部指针的，指针指针的Release方法，会调用内部指针的Relase，然后设...
ATL CComPtr和CComQIPtr详解 - C/C++ - 清泛网移动版 - 专注IT技能提升
...tialize方法前，需要手动释放所有的全局或者静态变量。
如何手动释放呢：
设置指针指向NULL
调用Release方法，注意是要调用智能指针的Release方法，而不是内部指针的，指针指针的Release方法，会调用内部指针的Relase，然后设...
ATL CComPtr和CComQIPtr详解 - C/C++ - 清泛网移动版 - 专注IT技能提升
...tialize方法前，需要手动释放所有的全局或者静态变量。
如何手动释放呢：
设置指针指向NULL
调用Release方法，注意是要调用智能指针的Release方法，而不是内部指针的，指针指针的Release方法，会调用内部指针的Relase，然后设...