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Filter items in database by comparing more than one colunm?


Filter items in database by comparing more than one colunm?

By : user2955908
Date : November 22 2020, 10:48 AM
this will help You can't use % in your selection directly and also should use AND keyword to filter based on two or more conditions
change your code as follow:
code :
mCursor = mDb.query(true, SQLITE_TABLE, new String[] {KEY_ROWID,
KEY_CODE, KEY_PRODUCT_NAME, KEY_PRODUCT_CATEGORY},
KEY_PRODUCT_NAME+ " like ? AND " + KEY_PRODUCT_CATEGORY + " LIKE = ?", new String[] { "%" + inputText + "%", "%"+ category + "%"} ,
null, null, null, null);


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comparing database items to find duplicates

comparing database items to find duplicates


By : nolski13
Date : March 29 2020, 07:55 AM
it fixes the issue i have no code as of yet because i have never written such a query. my company's e-commerce website offers 20% off the first purchase. we are finding sneaky people create multiple accounts to take advantage. at this point when creating an account, it only checks for a matching email. , Join on the same table:
code :
SELECT * FROM users u1 LEFT JOIN users u2 ON (u1.FirstName = u2.FirstName) 
    WHERE u1.Id != u2.Id;
best way to write sql and if statement comparing two items inside a database

best way to write sql and if statement comparing two items inside a database


By : nueh
Date : March 29 2020, 07:55 AM
I hope this helps you . I think you are well oriented. In order to improve the design probably is a good idea to identify..
All permissions names/concepts All permissions status (identity if the values are common between permission names)
code :
Select * from permissionsets where user like 'default' >> this will return the default set.
Select * from permissionsets where user like 'user1' >> this will return user1 permission set.
How to manage conditional colunm in MySQL database?

How to manage conditional colunm in MySQL database?


By : ishu yadav
Date : March 29 2020, 07:55 AM
I wish this help you By using columns in the same table you can enforce both the exclusivity and the referential integrity. In other words, you can ensure that in a given row at most one of the fields is non-NULL1 and references the existing row from the correct table. Alternatively, you could consider inheritance. For more on both, take a look at this post.
Something like cond_type bears no meaning from the DBMS perspective - you'll be forgoing the automatic enforcement of the referential integrity. And doing it manually in a concurrent environment is likely to be either incorrect or slow.2
How can I filter by comparing a column to its own row items

How can I filter by comparing a column to its own row items


By : Jade
Date : March 29 2020, 07:55 AM
I hope this helps . I have a bunch of data being pushed in a google sheet row by row. Each row has a reference number (COL A) and a date (COL D). For every reference number, I want to find the latest updated row. It's necessary that this is done by arrayformula. , try in E1:
code :
={"Last Update"; 
 ARRAYFORMULA(IFNA(VLOOKUP(A2:A; SORT({A2:A\ D2:D}; 2; 0); 2; 0)))}
Filter and delete items by comparing two arrays of objects with different elements

Filter and delete items by comparing two arrays of objects with different elements


By : GURU PRASAD IYER.V
Date : October 09 2020, 09:00 PM
I hope this helps . I have two arrays , You have a typo of Path vs path. The code works with this change.
code :
var arr1 = [{ path: "path1" }, { path: "path2" }],
    arr2 = [{ path: "path1" }],
    filteredElements = arr1.filter(function(obj) {
        return !arr2.some(function(obj2) {
            return obj.path === obj2.path;
            //         ^             ^
        });
    });
    
console.log(filteredElements);
var arr1 = [{ path: "path1" }, { path: "path2" }],
    arr2 = [{ path: "path1" }],
    i = arr1.length;

while (i--) {
    if (arr2.some(({ path }) => arr1[i].path === path)) {
        arr1.splice(i, 1);
    }
}

console.log(arr1);
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