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Joining three tables using MySQL
I have three tables named
8 Answers
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What does ON [PRIMARY] mean?
...ult one, which is always created, and so the SQL you've given creates your table ON the PRIMARY file group.
See MSDN for the full syntax.
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Is it possible to GROUP BY multiple columns using MySQL?
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Yes, you can group by multiple columns. For example,
SELECT * FROM table
GROUP BY col1, col2
The results will first be grouped by col1, then by col2. In MySQL, column preference goes from left to right.
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Force R not to use exponential notation (e.g. e+10)?
...file auto-executes it. This is useful for e.g. default package loads, data.table configuration, environment etc. Again, that config can run to a page of settings, and there's zero chance you'll remember those and their syntax and type them in
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Repeat table headers in print mode
Is it possible in CSS using a property inside an @page to say that table headers (th) should be repeated on every page if the table spreads over multiple pages?
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How do I view the SQLite database on an Android device? [duplicate]
...le Java activity file; just add it to your source folder.
You can view the tables in your app database, update, delete, insert rows to you table. Everything from inside your app.
When the development is done remove the Java file from your src folder. That's it.
You can view the 5 minute demo, Data...
CREATE TABLE IF NOT EXISTS equivalent in SQL Server [duplicate]
CREATE TABLE IF NOT EXISTS works on mysql but fails with SQL Server 2008 R2.
What is the equivalent syntax?
1 Answer
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Using arrays or std::vectors in C++, what's the performance gap?
...ong. The standard forbids exponential growth: § 23.2.3 paragraph 16 says "Table 101 lists operations that are provided for some types of sequence containers but not others. An implementation shall provide these operations for all container types shown in the “container” column, and shall implem...
Normalizing mousewheel speed across browsers
...k put together a great solution to this problem.
I have tested on a data table that I'm building using React and it scrolls like butter!
This solution works on a variety of browsers, on Windows/Mac, and both using trackpad/mouse.
// Reasonable defaults
var PIXEL_STEP = 10;
var LINE_HEIGHT = 4...
MySQL Update Inner Join tables query
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Update:
Since you said the query yielded a syntax error, I created some tables that I could test it against and confirmed that there is no syntax error in my query:
mysql> create table business (business_id int unsigned primary key auto_increment, mapx varchar(255), mapy varchar(255)) engine=...