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MySQL CONCAT returns NULL if any field contain NULL
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convert the NULL values with empty string by wrapping it in COALESCE
SELECT CONCAT(COALESCE(`affiliate_name`,''),'-',COALESCE(`model`,''),'-',COALESCE(`ip`,''),'-',COALESCE(`os_type`,''),'-',COALESCE(`os_version`,'')) AS device_name
FROM devices
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Weighted random numbers
...a weighted random numbers. I'm currently just banging my head against the wall and cannot figure this out.
7 Answers
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Using MySQL with Entity Framework [closed]
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You would need a mapping provider for MySQL. That is an extra thing the Entity Framework needs to make the magic happen. This blog talks about other mapping providers besides the one Microsoft is supplying. I haven't found any mentionings of MySQL.
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What is the runtime performance cost of a Docker container?
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Now some examples of memory (read the paper for details, memory can be extra tricky):
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How to include() all PHP files from a directory?
...t because this question was about including everything in a directory - usually this would be in different directories: eg DataClass defined in BE directory and BL.class.php defined in BL directory.
– Carmageddon
May 13 '13 at 15:52
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MFC Grid control 2.27 - C/C++ - 清泛网移动版 - 专注IT技能提升
...too badly . Joe was kind enough to allow me to release the source with no strings attached (since it is based on his code) but since the project was such a marathon I am placing a couple of very minor conditions on the use of this code:
This code may be used in compiled form in any way you desi...
MFC Grid control 2.27 - C/C++ - 清泛网移动版 - 专注IT技能提升
...too badly . Joe was kind enough to allow me to release the source with no strings attached (since it is based on his code) but since the project was such a marathon I am placing a couple of very minor conditions on the use of this code:
This code may be used in compiled form in any way you desi...
MFC Grid control 2.27 - C/C++ - 清泛网移动版 - 专注IT技能提升
...too badly . Joe was kind enough to allow me to release the source with no strings attached (since it is based on his code) but since the project was such a marathon I am placing a couple of very minor conditions on the use of this code:
This code may be used in compiled form in any way you desi...
MFC Grid control 2.27 - C/C++ - 清泛网移动版 - 专注IT技能提升
...too badly . Joe was kind enough to allow me to release the source with no strings attached (since it is based on his code) but since the project was such a marathon I am placing a couple of very minor conditions on the use of this code:
This code may be used in compiled form in any way you desi...
MFC Grid control 2.27 - C/C++ - 清泛网移动版 - 专注IT技能提升
...too badly . Joe was kind enough to allow me to release the source with no strings attached (since it is based on his code) but since the project was such a marathon I am placing a couple of very minor conditions on the use of this code:
This code may be used in compiled form in any way you desi...