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How to properly create composite primary keys - MYSQL
...ep these as two distinct columns. You could use a two-column primay key in mysql ...PRIMARY KEY(id_a, id_b)... but I prefer using a two-column unique index, and having an auto-increment primary key field.
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Storing JSON in database vs. having a new column for each key
...figured it was worth an update.
When this question was originally posted, MySQL had no support for JSON data types and the support in PostgreSQL was in its infancy. Since 5.7, MySQL now supports a JSON data type (in a binary storage format), and PostgreSQL JSONB has matured significantly. Both prod...
Return rows in random order [duplicate]
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For MySQL use ORDER BY uuid(). (...for those arriving on this page via a generic search, like me!)
– Stan James
Jan 7 '12 at 4:15
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Is there a Boolean data type in Microsoft SQL Server like there is in MySQL? [duplicate]
Is there a Boolean data type in Microsoft SQL Server like there is in MySQL?
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How to use GROUP_CONCAT in a CONCAT in MySQL
If I have a table with the following data in MySQL:
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Difference between BeautifulSoup and Scrapy crawler?
...ter extraction. For example we can configure pipeline to push data to your mysql server.
Cookies: scrapy automatically handles cookies for us.
etc.
TLDR: scrapy is a framework that provides everything that one might
need to build large scale crawls. It provides various features that
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MySQL Removing Some Foreign keys
I have a table whose primary key is used in several other tables and has several foreign keys to other tables.
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Count table rows
What is the MySQL command to retrieve the count of records in a table?
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Get current AUTO_INCREMENT value for any table
How do I get the current AUTO_INCREMENT value for a table in MySQL?
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SQLite INSERT - ON DUPLICATE KEY UPDATE (UPSERT)
MySQL has something like this:
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