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MySQL - How to select data by string length
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select * from table order by length(column);
Documentation on the length() function, as well as all the other string functions, is available here.
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How to select the rows with maximum values in each group with dplyr? [duplicate]
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For me, it helped to count the number of values per group. Copy the count table into a new object. Then filter for the max of the group based on the first grouping characteristic. For example:
count_table <- df %>%
group_by(A, B) %>%
count() %>%
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What MIME type should I use for CSV?
... Jun 27 '12 at 13:31
LittleBobbyTables - Au Revoir
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answered Aug 16 '11 at 9:24
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What is the purpose of Order By 1 in SQL select statement?
...relation names are allowed in the OREDER BY clause because, in theory, the table correlation names are out of scope i.e. should be ORDER BY PAYMENT_DATE;. Of course, not all SQL implementations conform to Standards.
– onedaywhen
Aug 10 '10 at 7:17
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Remove menu and status bars in TinyMCE 4
...ne strikethrough superscript subscript | formats | removeformat'},
table: {title: 'Table', items: 'inserttable tableprops deletetable | cell row column'},
tools: {title: 'Tools', items: 'spellchecker code'}
}
});
see TinyMCE for more help.
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What, exactly, is needed for “margin: 0 auto;” to work?
...y head:
The element must be block-level, e.g. display: block or display: table
The element must not float
The element must not have a fixed or absolute position1
Off the top of other people's heads:
The element must have a width that is not auto2
Note that all of these conditions must be tru...
How do we count rows using older versions of Hibernate (~2009)?
For example, if we have a table Books, how would we count total number of book records with hibernate?
8 Answers
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how to display full stored procedure code?
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just in case anyone is confused as to where that table is: pg_catalog -> system table -> pg_proc
– Dimitris
Aug 24 '12 at 7:19
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Why should I use document based database instead of relational database?
...ds of applications or domains where the document based database is more suitable than the relational database?
7 Answers
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What is the difference between single and double quotes in SQL?
...stant or a date/time constant.
Double quotes delimit identifiers for e.g. table names or column names. This is generally only necessary when your identifier doesn't fit the rules for simple identifiers.
See also:
Do different databases use different name quote?
You can make MySQL use double-q...