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selecting unique values from a column
I have a MySQL table which contains the following type of information:
9 Answers
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Laravel Eloquent: Ordering results of all()
...ry is more complex, and you need prevent generate a ORDER BY in the finish SQL, you can do:
$result = Project::select('name')->get();
$result = $result->sortBy('name');
$result = $result->values()->all();
Now is php who order the result.
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Remove the last character from a string [duplicate]
...issue where I didn't want to remove the last characters but a word from an SQL string at the END of the string only like " AND ", so I used this with substr("sqlstatement", 0, -7); to remove the last AND in the sequence of WHERE AND clauses I was writing. Worked like a charm :).
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Set the value of a variable with the result of a command in a Windows batch file
...re's how I do it when I need a database query's results in my batch file:
sqlplus -S schema/schema@db @query.sql> __query.tmp
set /p result=<__query.tmp
del __query.tmp
The key is in line 2: "set /p" sets the value of "result" to the value of the first line (only) in "__query.tmp" via the "...
What is the dual table in Oracle?
...esults, such as sysdate. Also helps you to check if Oracle is up and check sql syntax, etc.
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How can I check whether a option already exist in select by JQuery
...o input sanitization, and you end up with code practices that have haunted SQL for decades. So a -1 is completely unwarranted. The question even states that they want to insert values "dynamically". Don't patch your string together dynamically. You also don't do 'select 1 from users where password="...
Using Kafka as a (CQRS) Eventstore. Good idea?
...l back-ends or stand-alone products, it is well-documented how to create a SQL-based event store. And there are libraries available on top of a various kinds databases. There is also EventStore, which is built for this purpose.
In distributed scenarios, I've seen a couple of different implementatio...
Pandas count(distinct) equivalent
...am using pandas as a db substitute as I have multiple databases (oracle, mssql, etc) and I am unable to make a sequence of commands to a SQL equivalent.
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How to reset a single table in rails?
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To reset the index/primary key in SQLite just type:
$ rails console
> ActiveRecord::Base.connection.execute("DELETE from sqlite_sequence where name = 'yourtablename'")
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PostgreSQL query to list all table names?
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Documentation says only the current one: postgresql.org/docs/9.5/static/infoschema-tables.html "table_catalog sql_identifier Name of the database that contains the table (always the current database)"
– sudo
Sep 10 '16 at 5:53
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