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POiOS - CoreData or Sqlite suite my app?
 

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  1. POiOS - CoreData or Sqlite suite my app?
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    <p>My app have 2 entities (or tables).</p> <p><code>Category (id, name)</code><br> <code>Item (id, name, amount, date, categoryId)</code></p> <p>What I need is</p> <pre><code>SELECT categoryId, Category.name, SUM(IF(MONTH(FROM_UNIXTIME(date)) = 1, amount, 0)) AS jan SUM(IF(MONTH(FROM_UNIXTIME(date)) = 2, amount, 0)) AS feb SUM(IF(MONTH(FROM_UNIXTIME(date)) = 3, amount, 0)) AS mar SUM(IF(MONTH(FROM_UNIXTIME(date)) = 4, amount, 0)) AS apr SUM(IF(MONTH(FROM_UNIXTIME(date)) = 5, amount, 0)) AS may SUM(IF(MONTH(FROM_UNIXTIME(date)) = 6, amount, 0)) AS jun SUM(IF(MONTH(FROM_UNIXTIME(date)) = 7, amount, 0)) AS jul SUM(IF(MONTH(FROM_UNIXTIME(date)) = 8, amount, 0)) AS aug SUM(IF(MONTH(FROM_UNIXTIME(date)) = 9, amount, 0)) AS sep SUM(IF(MONTH(FROM_UNIXTIME(date)) = 10, amount, 0)) AS oct SUM(IF(MONTH(FROM_UNIXTIME(date)) = 11, amount, 0)) AS nov SUM(IF(MONTH(FROM_UNIXTIME(date)) = 12, amount, 0)) AS dec FROM Item INNER JOIN Category ON Item.categoryId = Category.id WHERE YEAR(FROM_UNIXTIME(date)) = 2012 GROUP BY categoryId </code></pre> <p><strong>NOTE: The above query is written in MySQL way, and I'm totally new to CoreData &amp; Sqlite</strong></p> <p>In this situation, CoreData <strong>VS</strong> Sqlite, which 1 is more suitable?</p> <p>How to translate the above sql to CoreData or Sqlite form?</p> <p>Thanks.</p> <h1>Edit</h1> <p>Can I mix both? For <code>CRUD</code> is using <strong>CoreData</strong>, however for such a complex query use <strong>Sqlite</strong><em>(FMDB library)</em>?</p> <p>By default, CoreData has created a file with extension <strong>.sqlite</strong>. However, in <a href="https://github.com/ccgus/fmdb#database-creation" rel="nofollow">FMDB github instruction</a> here is with the extension <strong>.db</strong>. Does it matter?</p> <p>Is the database path <code>[FMDatabase databaseWithPath:@"/tmp/tmp.db"];</code> same as CoreData?</p>
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    1. PTQuestion
    1. USJs Lim
    1. USJs Lim
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      1. POiOS - CoreData or Sqlite suite my app?
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      1. VTDownMod
    1. COSee the documentation for [CASE](http://www.sqlite.org/lang_expr.html#case) and [strftime](http://www.sqlite.org/lang_datefunc.html).
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      1. POiOS - CoreData or Sqlite suite my app?
      1. USCL.
    2. CO[here](http://rdcworld-iphone.blogspot.in/2013/04/simple-and-basic-coredata-in-iphone.html) is the simple tutorial to get familiar with Core Data, may help you
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      1. POiOS - CoreData or Sqlite suite my app?
      1. USswiftBoy
    3. CO@RDC Thanks your comment anyway, but I'm trying to ask about complex query in CoreData which may involve 2 or more table joining
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      1. USJs Lim
 

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