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You need to change date type to CHAR using CAST function like. CONCAT(CAST(`date_from` AS CHAR),' - ',CAST(`date_to` AS CHAR)) AS `period`
Definition and Usage. The CONCAT () function adds two or more expressions together. Note: Also look at the CONCAT_WS () function. Syntax. CONCAT (expression1, expression2, expression3,...) Parameter Values. Technical Details. Works in: From MySQL 4.0. More Examples. Example. Add three columns into one "Address" column:
26 sty 2024 · The CONCAT function in MySQL is a string function that allows you to join two or more strings together. This can be incredibly useful when working with database tables where you need to combine information from different columns or add a certain format to the data you retrieve.
1 sty 2006 · Assuming that the original date is dd/mm/YYYY and the required format is YYYYmmdd then you could do something like this: UPDATE wp_postmeta SET meta_value = concat(substring(meta_value,7,4),substring(meta_value,4,2),substring(meta_value,1,2))
Use the MySQL CONCAT() function to concatenate multiple strings into a single string. The CONCAT() function returns NULL if any string argument is NULL.
7 lis 2013 · UPDATE tabex SET field1=CONCAT_WS(',', tabex.a1, tabex.a2, tabex.a3,...); Another advantage of the CONCAT_WS() function is, that it ignores NULL values. Read more about the two functions in the manual.
7 cze 2022 · CONCAT() function in MySQL is used to concatenating the given arguments. It may have one or more arguments. If all arguments are nonbinary strings, the result is a nonbinary string. If the arguments include any binary strings, the result is a binary string.
