SQL

SQL stands for structured query language. It uses commands such as "select", "insert", "update", "delete". Some common relational database management systems that use SQL are: Oracle, MySQL, Microsoft SQL Server, PostgreSQL, etc.
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Working on a project I ran into the documentation for customizing the Foreign Key.
The docs read:
// https://sequelize.org/master/manual/assocs.html
// For example, to use UUID as the foreign key data type instead of the default (INTEGER), you can simply do:
const { DataTypes } = require("Sequelize");
Foo.hasOne(Bar, {
foreignKey: {
// name: 'myFooId'
type: D
Sometimes it is needed to store compressed data in the DB. Unfortunately not all the DBs have built-in compression and FUSE compressed FSes are not available for every OS. So it may make sense to store compressed binary blobs in the DB.
Unfortunately when one sees them in DBeaver he sees them compressed, but often they are needed uncompressed. So it'd be nice to have a feature to decompress the
Currently, tree.NotExpr
is not implemented natively in the vectorized engine, so we have to fallback to the older row-by-row engine to evaluate it. We should, instead, vectorize NotExpr
.
I think the implementation will be quite similar to how tree.IsNullExpr
is implemented, and I think we will want to implement two versions of NotExpr
operator:
- one for projections, which populates a
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Nov 13, 2021 - C++
## Python/Regex fix
This is a reminder for me or a task if anyone wants :P
Basically, The last two questions aren't really regex's questions.
To do:
- Move said questions to correct place.
- Add new regex questions (Python related!)?
- Maybe add a new ## Regex section, as it is a valuable skill
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Nov 12, 2021 - C++
Currently we only support Upsert for CockroachDB. Implementing same for MySQL should be pretty straightforward as well.
Wonder if we can also use INSERT ON CONFLICT UPDATE for PostgreSQL to ensure operation with same signature also works.
Hi community,
I found shardingsphere-db-discovery-mgr
module need to add unit test. it 's task list :
- MGRDatabaseDiscoveryType.startPeriodicalUpdate()
- MGRDatabaseDiscoveryType.updateProperties()
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Nov 12, 2021 - C
Describe the bug
Using a time dimension on a runningTotal measure on Snowflake mixes quoted and unquoted columns in the query. This fails the query, because Snowflake has specific rules about quoted columns. Specifically:
- All unquoted column names are treated as upper case
- Quoted column names are case sensitive.
So "date_from" <> date_from
To Reproduce
Steps to reproduce
Issue description
This option will improve performance in many scenarios
https://dev.mysql.com/worklog/task/?id=8134
https://www.facebook.com/weixiang.zhai/posts/678596755543802
alter table player_season_stat_totals add column league_id INT;
alter table player_season_stat_totals drop primary key;
alter table player_season_stat_totals add primary key (player_id, team_id, season_id, season_type_id, league_id);
update player_season_stat_totals set league_id=0;
get error: column <league_id> received nil but is non-nullable
Shouldn't be able to add primary
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Sep 30, 2021 - JavaScript
Hello Philip!
I think there is an issue with this part of the code of rqlite (store/store.go).
func (s *Store) Database(leader bool) ([]byte, error) {
if leader && s.raft.State() != raft.Leader {
return nil, ErrNotLeader
}
// Ensure only one snapshot can take place at once, and block all queries.
s.mu.Lock()
defer s.mu.Unlock()
f, err := ioutil.TempFile("", "rqlilte-snap-
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Nov 13, 2021 - Python
Whenever I submit a GET request to the api/public/groups endpoint, the "collections" field for each group returns "None" on every group, even if they have access to collections. I can verify that the
It looks like there are hints at connecting directly with a socket path https://github.com/beekeeper-studio/beekeeper-studio/blob/9ff3131030057364f31f3034677fc0f6a9bd48b5/src/lib/connection-provider.js#L23
But there does not appear to be anything in the UI to indicate
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Nov 9, 2021 - Go
The goal is to create thin, easy to use PHP client for sending ILP messages. We already have a Java client:
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Nov 6, 2021 - Go
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Oct 19, 2021 - Python
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Nov 12, 2021 - C#
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Nov 12, 2021 - Jupyter Notebook
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