I have a table named ‘staff’, with several columns, but the two I’m interested in are ‘username’ and ‘password’. I am trying to create a prompt which asks the user for their username (and later I will do password) and checks the table in the database to see if that us…
Tag: sql
Wpdb prepare was called incorrectly
I want to prepare my data to avoid SQL Injections. So my current working code to show a list of data from a table’s column: I need to use $wpdb->prepare to be sure that my datas are correctly brought from the db. My current progress: This isn’t working. I get a notice: Notice: wpdb::prepare was…
How do I make aggregate query return empty set instead of NULL row?
I have a SQL query like this: However, when t2 selection is empty, it returns a row containing NULL values (because of MAX function returning NULL when called on an empty set). I would like it to return an empty set instead. How can I achieve it? Answer Try this in sql server … try this in Mysql
Reuse a parameter in a PreparedStatement?
I am passing a parameter to a PreparedStatement like this : And the query looks like this : Now I want to modify my query like this, and reuse the first parameter (both ? would use the runId parameter) : Is that possible without doing this : Answer This cannot be done with plain JDBC. You could instead use Sp…
Laravel 5 Eloquent where and or in Clauses
i try to get results from table with multiple where and/or clauses. My SQL statement is: SELECT * FROM tbl WHERE m__Id = 46 AND t_Id = 2 AND (Cab = 2 OR Cab = 4) How i can get this with Laravel …
Why would MySQL execute return None?
I am trying to query on a local MySQL database using Python’s (3.4) MySQL module with the following code: As far as I can tell, the connection is successful, the database is composed of several rows but the query always returns the none type. What instances does the MySQL execute function return None? A…
Can’t see created tables in Object Explorer – Microsoft SQL Management Studio
I am trying to create some tables within a database, however the tables are not appearing in my object explorer view. my code is as follows: I looked this up before posting and found this exact question: Creating table with T-SQL – can’t see created tables in Object explorer However, he was using …
Oracle Sql: How to add multi sub total in sql?
I want query multi sub total in query sql. How query multi sub total. please help me. SQL CODE: Result Query: But i want add multi sub total in query. I want Result Query: How add multi row sub total? Help me please. Thanks in advance. 😉 Answer I will post a solution with using the group by rollup extension.…
T-SQL Dollar Sign In Expressions
In this answer, there is a trick which allows to use the ROW_NUMBER() windowed function with a ‘constant’ in the ORDER BY clause: After some search in Google, I can’t find what dollar sign means in this context? I’ve tried to execute a simple query: And it returns 0. Could somebody exp…
SQL: error when creating a foreign table that has an enum column
I’m creating a foreign table (foo_table) in database_a. foo_table lives in database_b. foo_table has an enum (bar_type) as one of its columns. Because this enum is in database_b, the creation of the foreign table fails in database_a. database_a doesn’t understand the column type. Running the follo…