DBMS > Lovefield vs. Microsoft Azure Search vs. Microsoft SQL Server
System Properties Comparison Lovefield vs. Microsoft Azure Search vs. Microsoft SQL Server
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|Editorial information provided by DB-Engines|
|Name||Lovefield Xexclude from comparison||Microsoft Azure Search Xexclude from comparison||Microsoft SQL Server Xexclude from comparison|
|Primary database model||Relational DBMS||Search engine||Relational DBMS|
|Secondary database models||Document store|
|Current release||2.1.12, February 2017||V1||SQL Server 2019, November 2019|
|License Commercial or Open Source||Open Source Apache 2.0||commercial||commercial restricted free version is available|
|Cloud-based only Only available as a cloud service||no||yes||no|
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|Typing predefined data types such as float or date||yes||yes||yes|
|XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.||no||no||yes|
|APIs and other access methods||RESTful HTTP API||ADO.NET|
Tabular Data Stream (TDS)
|Server-side scripts Stored procedures||no||no||Transact SQL, .NET languages, R, Python and (with SQL Server 2019) Java|
|Triggers||Using read-only observers||no||yes|
|Partitioning methods Methods for storing different data on different nodes||none||Sharding Implicit feature of the cloud service||tables can be distributed across several files (horizontal partitioning); sharding through federation|
|Replication methods Methods for redundantly storing data on multiple nodes||none||yes Implicit feature of the cloud service||yes, but depending on the SQL-Server Edition|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||yes||no||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||no||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes, by using IndexedDB or the cloud service Firebase Realtime Database||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes using MemoryDB||no||yes|
|User concepts Access control||no||yes using Azure authentication||fine grained access rights according to SQL-standard|
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|Lovefield||Microsoft Azure Search||Microsoft SQL Server|
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