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How to debug Lock wait timeout exceeded on MySQL?
In my production error logs I occasionally see:
11 Answers
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Avoid duplicates in INSERT INTO SELECT query in SQL Server
I have the following two tables:
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SELECT * FROM X WHERE id IN (…) with Dapper ORM
What is the best way to write a query with IN clause using Dapper ORM when the list of values for the IN clause is coming from business logic? For example let's say I have a query:
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MySQL: Quick breakdown of the types of joins [duplicate]
I would like a quick breakdown of the types of MySQL joins. I know of these, the rest I am not sure what they mean.
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Rails find record with zero has_many records associated [duplicate]
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Bah, found it here: https://stackoverflow.com/a/5570221/417872
City.includes(:photos).where(photos: { city_id: nil })
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Hibernate throws org.hibernate.AnnotationException: No identifier specified for entity: com..domain.
Why am I getting this exception?
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jQuery Determine if a matched class has a given id
What is jQuery has id equivalent of the following statement?
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Convert Django Model object to dict with all of the fields intact
...vert a Django Model object to a dict with all of its fields? All ideally includes foreign keys and fields with editable=False .
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What is the difference between partitioning and bucketing a table in Hive ?
I know both is performed on a column in the table but how is each operation different.
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How to select unique records by SQL
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With the distinct keyword with single and multiple column names, you get distinct records:
SELECT DISTINCT column 1, column 2, ...
FROM table_name;
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