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LINQ to SQL Left Outer Join
..."left" row in a left-outer-join will match 0-n "right" rows (in the second table), where-as yours matches only 0-1. To do a left outer join, you need SelectMany and DefaultIfEmpty, for example:
var query = from c in db.Customers
join o in db.Orders
on c.CustomerID equals o...
SELECT * FROM X WHERE id IN (…) with Dapper ORM
...er supports this directly. For example...
string sql = "SELECT * FROM SomeTable WHERE id IN @ids"
var results = conn.Query(sql, new { ids = new[] { 1, 2, 3, 4, 5 }});
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“Connection for controluser as defined in your configuration failed” with phpMyAdmin in XAMPP
...find a sub-directory called sql.
In sql you will find a file called create_tables.sql. Open it in a text editor.
In phpMyAdmin, select the phpmyadmin database and click on the "SQL" tab.
Copy/paste the entire text from create_tables.sql into the text box, and run the query.
Open the config.inc.php f...
How do I ALTER a PostgreSQL table and make a column unique?
I have a table in PostgreSQL where the schema looks like this:
3 Answers
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Pretty Printing a pandas dataframe
How can I print a pandas dataframe as a nice text-based table, like the following?
9 Answers
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How to hide columns in HTML table?
I have created a table in ASPX. I want to hide one of the columns based on the requirement but there is no attribute like visible in the HTML table building. How can I solve my problem?
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What is an index in SQL?
...ng some column in your query and then walk through only that subset of the table to find exact matches. If you don't have indexes on any column in the WHERE clause, the SQL server has to walk through the whole table and check every row to see if it matches, which may be a slow operation on big table...
How to add a margin to a table row [duplicate]
I have a table containing many rows. Some of these rows are class="highlight" and signify a row that needs to be styled differently and highlighted. What I'm trying to do is add some extra spacing before and after these rows so they appear slightly separated from the other rows.
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How to make Sequelize use singular table names
I have an model called User but Sequelize looks for the table USERS whenever I am trying to save in the DB. Does anyone know how to set Sequelize to use singular table names? Thanks.
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Deleting Row in SQLite in Android
...tion, but I'm new to SQLite and I can't seem to figure this out. I have 1 table that has columns KEY_ROWID , KEY_NAME , KAY_LATITUDE , and KEY_LONGITUDE . I want the user to be able to select one and delete it; Can anyone give me a direction to start in? My question is in the actual deletion ...