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Spring Data: “delete by” is supported?
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When you go with query by method (2nd way) it will first do a get call
select * from user where last_name = :firstName
Then it will load it in a List
Then it will call delete id one by one
delete from user where id = 18
delete from user where id = 19
First fetch list of object, then for loo...
Undo part of unstaged changes in git
...ier if you use a good editor mode or plugin, which may provide support for selecting lines directly to revert, as -p can be a bit clumsy to use sometimes. I use Magit, an Emacs mode that is very helpful for working with Git. In Magit, you can run magit-status, find the diffs for the changes that you...
How random is JavaScript's Math.random?
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90 have 2 digits
900 have 3 digits
1 has 4 digits
and so on.
So if you select some at random, then that vast majority of selected numbers will have the same number of digits, because the vast majority of possible values have the same number of digits.
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Postgresql - unable to drop database because of some auto connections to DB
...n psql)
You can then terminate all connections to this db except your own:
SELECT pid, pg_terminate_backend(pid)
FROM pg_stat_activity
WHERE datname = current_database() AND pid <> pg_backend_pid();
On older versions pid was called procpid so you'll have to deal with that.
Since you've revo...
Is there a way to get the XPath in Google Chrome?
...asking "how to get an xpath string for an element?", rather than "how do i select by xpath?" wasn't he?
– Max Williams
Jan 3 '12 at 11:05
3
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Can I do a partial revert in GIT
... can also do git add -p to start an interactive session that allows you to selectively add chunks of files, instead of entire files. (There's also git reset -p to selectively unstage changes. Good to know, but probably not what you want in this scenario.)
– Stéphan Kochen
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Give all the permissions to a user on a DB
...%', ( -- use instead of EXECUTE to see generated commands
EXECUTE (
SELECT string_agg(format('GRANT USAGE ON SCHEMA %I TO my_user', nspname), '; ')
FROM pg_namespace
WHERE nspname <> 'information_schema' -- exclude information schema and ...
AND nspname NOT LIKE 'pg\_%' ...
How can I match on an attribute that contains a certain string?
I am having a problem selecting nodes by attribute when the attributes contains more than one word. For example:
10 Answer...
What is the difference between synchronous and asynchronous programming (in node.js)
...xamples:
// Example 1 - Synchronous (blocks)
var result = database.query("SELECT * FROM hugetable");
console.log("Query finished");
console.log("Next line");
// Example 2 - Asynchronous (doesn't block)
database.query("SELECT * FROM hugetable", function(result) {
console.log("Query finished")...
How to choose the id generation strategy when using JPA and Hibernate
...d
uses a database-generated GUID string on MS SQL Server and MySQL.
native
selects identity, sequence or hilo depending upon the capabilities of the underlying database.
assigned
lets the application assign an identifier to the object before save() is called. This is the default strategy if no elem...