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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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SQL selecting rows by most recent date
...eturns a result set with ChargeId, ChargeType, and MostRecentServiceMonth
SELECT
CHARGEID,
CHARGETYPE,
MAX(SERVICEMONTH) AS "MostRecentServiceMonth"
FROM INVOICE
GROUP BY CHARGEID, CHARGETYPE
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Add … if string is too long PHP [duplicate]
...lay the whole field, but on the other, I just want to display the first 50 characters. If the string in the description field is less than 50 characters, then it won't show ... , but if it isn't, I will show ... after the first 50 characters.
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reformat in vim for a nice column layout
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Great tip! Just adding, it works for visual selection too with :'<,'>!column -t
– freitass
Aug 23 '12 at 13:16
2
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M_PI works with math.h but not with cmath in Visual Studio
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As suggested by user7860670, right-click on the project, select properties, navigate to C/C++ -> Preprocessor and add _USE_MATH_DEFINES to the Preprocessor Definitions.
That's what worked for me.
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Does this app use the Advertising Identifier (IDFA)? - AdMob 6.8.0
...using GA to collect IDFA, but does not display ads within my app, I should select - Attribute this app installation to a previously served advertisement. - Attribute this app installation to a previously served advertisement. - Limit Ad Tracking setting in iOS. In this case, will my app get approve...
Where to find Java JDK Source Code? [closed]
...leases this zip was missing but again it is available.
make sure that you select source as well from installation wizard.
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mysql error 1364 Field doesn't have a default values
...nt tool, such as phpMyAdmin: -- verified that the mode was previously set select @@GLOBAL.sql_mode; -- UPDATE MODE SET @@global.sql_mode= 'YOUR_VALUE';
– anasanjaria
Dec 4 '13 at 18:17
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List of All Locales and Their Short Codes?
...NE: "French (Niger)",
fr_RW: "French (Rwanda)",
fr_RE: "French (Réunion)",
fr_BL: "French (Saint Barthélemy)",
fr_MF: "French (Saint Martin)",
fr_SN: "French (Senegal)",
fr_CH: "French (Switzerland)",
fr_TG: "French (Togo)",
fr: "French",
ff_SN: "Fulah (Senegal)...
Command line progress bar in Java
...plemented this sort of thing before. Its not so much about java, but what characters to send to the console.
The key is the difference between \n and \r.
\n goes to the start of a new line. But \r is just carriage return - it goes back to the start of the same line.
So the thing to do is to prin...