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DBI, Placeholders, and a nested query : r perl - Reddit I’m not familiar with MSSQL, but with other databases, I would suggest attempting to insert the new record (assuming there is a unique key to prevent duplicate records) and then either catch (if I cared) or ignore (if I don’t care) the duplicate key exception and then issue the UPDATE; or attempt the update, check the number of rows affected, and if it was zero, run the insert
SQLite - can I use placeholder for table names? : r learnpython - Reddit Here is simple example, what I tried to do I can't get f string to work in my case to use it as table name placeholder and I can't figure it out, what you are suggesting (I'm beginner and English is not my primary language):
Url submission : r duckduckgo - Reddit When I submitting url in bang submission in duck duck go it saying this - Please add a query placeholder like {{{s}}} in the URL
Using named placeholders in queries and PSQLs :alnum: at the . . . - Reddit The problem I have is that in the same query I use PSQL's :alnum: like: regexp_replace(name, '[^[:alnum:] -]', '', 'g')) Executing this yields the error: ActiveRecord::PreparedStatementInvalid (missing value for :alnum in SELECT) In other words, Rails thinks that :alnum is a named placeholder But it isn't, it's a PostgreSQL 's keyword, so
Tricks to searching on Facebook Marketplace - Reddit query=tv Build out some searches that work for you, then add them to your Favorites Bookmarks Feel free to add comments with qualifiers you find that work, and I'll add them to the list
Why is it considered bad practice to write raw SQL commands? When you or your ORM execute that query it'll send a value to put in place of that ? But rather than just copy pasting the raw value in there it'll do things to make sure the values can't cause SQL injection attacks Basically that placeholder gets you a whole bunch of protection against malicious values that just putting strings together
What is the reason of this question mark ? in JDBC or SQL? The question mark is a placeholder in your SQL statement that is given a real value when the statement is executed They're known as query parameters As others have said, they're a way to prevent SQL injection, but also they make your code much more readable in any case, so if you're putting SQL into any programming language, use parameters
Postgres reusing the value placeholder : r golang - Reddit In Postgres, the value placeholder is $#, which one is recommend when the value is the same, reusing the value placeholder or not? db Exec("INSERT INTO tables (col1, col2) VALUES ($1, $1)", "foo") or