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Showing posts with label SQL. Show all posts
Showing posts with label SQL. Show all posts
Wednesday, 10 July 2013

SQL Server Query Optimization Statistics

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What are Query Optimization Statistics? The term statistics refers specifically to distribution statistics. Distribution statistics describe...

Impala: Open Source Real-Time SQL Queries on Hadoop

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Cloudera Impala is an open source system which provides real-time SQL querying functionality on top of Hadoop. Impala High-level Archite...
Tuesday, 9 July 2013

Finding the most recent purchase by each customer with SQL

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If you have transaction history such as purchases in a database (or really any list of items with timestamps), you frequently want to pick o...

Groupdate.sql - Better SQL group by date

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Groupdate.sql provides the simplest way to group by: day week month day of the week hour of the day and more Timezone support is inc...
Sunday, 7 July 2013

Large Scale Data Analytics with XtremeData Parallel SQL Database Engine

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XtremeData dbX is a full SQL and ACID compliant database engine based on shared-nothing, massive parallel query execution. The underlying te...
Monday, 1 July 2013

Sparse matrix multiplication using SQL

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a and b are two sparse matrices. We want to perform a * b as shown below: Sparse matrix multiplication using SQL We can represent a spa...
Friday, 28 June 2013

Fluent SQL - a minimalistic SQL builder for Java

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Github user ivanceras  has published a new SQL API library for Java called Fluent SQL . A minimalistic Fluent SQL API for Java built with...
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