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“Java DateFormat is not threadsafe” what does this leads to?
... DateFormat object and called its format() for values read via JDBC. I had SQL select statement where I read the same date with different names (SELECT date_from, date_from AS date_from1 ...). Such statements were using in 5 threads for various dates in WHERE clasue. Dates looked "normal" but they d...
SELECT * WHERE NOT EXISTS
...k I'm going down the right path with this one... Please bear with me as my SQL isn't the greatest
5 Answers
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JPQL IN clause: Java-Arrays (or Lists, Sets…)?
...ry number of values from our database. The logical way to go about this in SQL would be to build an "IN" clause. JPQL allows for IN, but it seems to require me to specify every single parameter to IN directly (as in, "in (:in1, :in2, :in3)").
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jsonify a SQLAlchemy result set in Flask [duplicate]
I'm trying to jsonify a SQLAlchemy result set in Flask/Python.
15 Answers
15
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What are the First and Second Level caches in Hibernate?
...wont process one transaction many
times. Mainly it reduces the number of SQL queries it needs to
generate within a given transaction. That is instead of updating after
every modification done in the transaction, it updates the transaction
only at the end of the transaction.
1.2) Second-lev...
Why do you create a View in a database?
... users have the ability to run their own queries (through some interactive SQL program or writing their own scripts), they can run select * from customer which gives them access to everything. If you give them access to the view and not the table, they cannot access fields that aren't in the view.
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Postgresql SELECT if string contains
So I have a in my Postgresql:
5 Answers
5
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Query grants for a table in postgres
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\z mytable from psql gives you all the grants from a table, but you'd then have to split it up by individual user.
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How to list records with date from the last 10 days?
Does this work on PostgreSQL?
6 Answers
6
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How to do a batch insert in MySQL
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From the MySQL manual
INSERT statements that use VALUES
syntax can insert multiple rows. To do
this, include multiple lists of column
values, each enclosed within
parentheses and separated by commas.
Example:
INSERT INTO...