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MySQL DISTINCT on a GROUP_CONCAT()

I am doing SELECT GROUP_CONCAT(categories SEPARATOR ' ') FROM table . Sample data below: 6 Answers ...
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how to check the dtype of a column in python pandas

...know this is a bit of an old thread but with pandas 19.02, you can do: df.select_dtypes(include=['float64']).apply(your_function) df.select_dtypes(exclude=['string','object']).apply(your_other_function) http://pandas.pydata.org/pandas-docs/version/0.19.2/generated/pandas.DataFrame.select_dtypes.h...
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What's the purpose of SQL keyword “AS”?

...ynes Yes. Just concatenate (||) the columns and then give it an alias e.g. SELECT foo || bar AS foobar. – Rupert Madden-Abbott Dec 10 '18 at 14:26 ...
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Find CRLF in Notepad++

...h processes: Simple search (Ctrl+F), Search Mode = Normal You can select an EOL in the editing window. Just move the cursor to the end of the line, and type Shift+Right Arrow. or, to select EOL with the mouse, start just at the line end and drag to the start of the next line; dr...
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Open directory dialog

I want the user to select a directory where a file that I will then generate will be saved. I know that in WPF I should use the OpenFileDialog from Win32, but unfortunately the dialog requires file(s) to be selected - it stays open if I simply click OK without choosing one. I could "hack up" the f...
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How to create P12 certificate for iOS distribution

...hain Access where it will be matched up with the private key. You can then select the cert, and open the arrow to also select the private key and export them together as a .p12 file from Keychain Access. share | ...
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How to remove all MySQL tables from the command-line without DROP database permissions? [duplicate]

...tatements to execute it: SET FOREIGN_KEY_CHECKS = 0; SET @tables = NULL; SELECT GROUP_CONCAT('`', table_schema, '`.`', table_name, '`') INTO @tables FROM information_schema.tables WHERE table_schema = 'database_name'; -- specify DB name here. SET @tables = CONCAT('DROP TABLE ', @tables); PRE...
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Mysql order by specific ID values

... use ORDER BY and FIELD function. See http://lists.mysql.com/mysql/209784 SELECT * FROM table ORDER BY FIELD(ID,1,5,4,3) It uses Field() function, Which "Returns the index (position) of str in the str1, str2, str3, ... list. Returns 0 if str is not found" according to the documentation. So actual...
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How to reset sequence in postgres and fill id column with new data?

... SELECT setval('seq', 1, FALSE) should do the same (here, the third argument, FALSE, does the magic, as it shows that nextval must be 1 instead of 2) – Vasilen Donchev Sep 22 '15 at 14:43...
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How do you join on the same table, twice, in mysql?

... you'd use another join, something along these lines: SELECT toD.dom_url AS ToURL, fromD.dom_url AS FromUrl, rvw.* FROM reviews AS rvw LEFT JOIN domain AS toD ON toD.Dom_ID = rvw.rev_dom_for LEFT JOIN domain AS fromD ON fromD.Dom_ID = rvw.rev_dom_from ED...