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How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
...ATE TABLE test (
id INT UNSIGNED NOT NULL AUTO_INCREMENT,
data VARCHAR(64) DEFAULT NULL,
ts TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (id)
);
mysql> REPLACE INTO test VALUES (1, 'Old', '2014-08-20 18:47:00');
Query OK, 1 row affected (0.04 sec)...
Is effective C++ still effective?
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TemplateRexTemplateRex
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Iteration over std::vector: unsigned vs signed index variable
...ame as unsigned int, which can lead to programming errors, particularly as 64-bit architectures become more prevalent.
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Add one row to pandas DataFrame
...Simple df2.loc[i] = ... would do. For me it reduced the time from 10s to 8.64s
– krassowski
Jan 23 '19 at 20:44
Please...
How to find the size of localStorage
...ngth*16)/(8*1024)) + ' KB' : 'Empty (0 KB)';
};
Mine returned: "30.896484375 KB"
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Provide an image for WhatsApp link sharing
... where can I find the correct specification?
– elios264
Jun 19 '18 at 16:26
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Why should I avoid std::enable_if in function signatures
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TemplateRexTemplateRex
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How to avoid “too many parameters” problem in API design?
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Samuel NeffSamuel Neff
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How to include file in a bash shell script
...u 18.04 and the Bash version is:
GNU bash, version 4.4.19(1)-release (x86_64-pc-linux-gnu)
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jQuery selector for the label of a checkbox
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gsamaras
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answered Aug 3 '12 at 7:08
Hanky PankyH...