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MySQL string replace

... UPDATE your_table SET your_field = REPLACE(your_field, 'articles/updates/', 'articles/news/') WHERE your_field LIKE '%articles/updates/%' Now rows that were like http://www.example.com/articles/updates/43 will be http://www.examp...
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How can one display images side by side in a GitHub README.md?

... The easiest way I can think of solving this is using the tables included in GitHub's flavored markdown. To your specific example it would look something like this: Solarized dark | Solarized Ocean :-------------------------:|:-------------------------: ![](https://.....
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When to add what indexes in a table in Rails

... end of the index. If you have a has_many :through relationship, your join table should have a unique index on both properties involved in the join as a compound key. If you fetch a record directly using a unique identifier such as username or email, that should be a unique index. If you fetch sets ...
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Count the number of occurrences of a string in a VARCHAR field?

I have a table like this: 7 Answers 7 ...
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what is the difference between GROUP BY and ORDER BY in sql

...regation functions on non-grouped columns (such as SUM, COUNT, AVG, etc). TABLE: ID NAME 1 Peter 2 John 3 Greg 4 Peter SELECT * FROM TABLE ORDER BY NAME = 3 Greg 2 John 1 Peter 4 Peter SELECT Count(ID), NAME FROM TABLE GROUP BY NAME = 1 Greg 1 John 2 Peter SELECT NAME FROM TABLE GROUP B...
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Sorting rows in a data table

We have two columns in a DataTable , like so: 12 Answers 12 ...
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What is the significance of load factor in HashMap?

...apacity and load factor. The capacity is the number of buckets in the hash table, and the initial capacity is simply the capacity at the time the hash table is created. The load factor is a measure of how full the hash table is allowed to get before its capacity is automatically increased. When the ...
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SQL statement to select all rows from previous day

...for a good SQL Statement to select all rows from the previous day from one table. The table holds one datetime column. I am using SQL Server 2005. ...
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UITableview: How to Disable Selection for Some Rows but Not Others

I am displaying in a group tableview contents parsed from XML. I want to disable the click event on it (I should not be able to click it at all) The table contains two groups. I want to disable selection for the first group only but not the second group. Clicking the first row of second group nav...
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Should I index a bit field in SQL Server?

...k for a set of rows, SQL uses the index to find the rows more quickly than table scanning (looking at every row). SQL has clustered and non-clustered indexes. My understanding of clustered indexes is that they group similar index values into the same page. This way when you ask for all the rows m...