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LMDB vs. Microsoft SQL Server 2017

LMDB Microsoft SQL Server 2017 + Add column
Preference (57% global votes) (20% global votes)
Website symas.​com/​mdb www.​microsoft.​com/​sqlserver
Database model
Data storage
Embeddable Yes Yes
Query language
Data types
Conditional entry updates No Yes
Map and reduce No No
Unicode No Yes
TTL for entries No No
Compression No Yes
Integrity model
Atomicity Yes Yes
Consistency Yes Yes
Isolation Yes Yes
Durability (data storage) Yes Yes
Transactions Yes Conditional
Referential integrity No Yes
Revision control No ?
Locking model
Secondary Indexes No Yes
Composite keys No Yes
Full text search No Yes
Geospatial Indexes No Yes
Graph support No ?
Horizontal scalable No Yes
Replication No Yes
Replication mode
Sharding No ?
Shared nothing architecture ? Yes
Value size max. 4 GB 2.15 GB
System requirements
Operating system
Native driver
Memory minimum 64 kB ?
Programming language
Description Memory-Mapped, Copy-on-Write Relational Database Management System
Multi-user system Yes Yes
Database ?
Price rating ★★★★★ ?
Software distribution ?
Release Date September 2011 ?
Documentation level ★★★★★ ★★★★☆
Lines of code 7 k ?
Free to use Yes Conditional
Active Yes ?
Real time analytics Yes Yes
Creation Date 2009 ?
Community Driven Good No
API Basic ?
Online backup Yes Yes
Function Based Index No ?
Implementation flexibility (50% global votes) (0% global votes)
Download gitorious.​org/​mdb ?
Backup functionality Good Good
Query Cache No Yes
Ease of use ★★★★☆ ?
In-Place Update Yes ?
Free for commercial use Yes Yes
Sorts Yes Yes
Read preferences No ?
Open Source Yes No
Maximum size 9.2 EB ?
Perfomance ★★★★★ ★★★★☆
JSON Yes Yes
Batch Loading Yes ?
Corruption Resistant Yes ?
Standard compliance ? Yes
Object-Relational Mapping (ORM) ? Yes
Database Connection Pooling ? Yes
Web interface ? Yes
Data encryption ? Yes
Cloud platform support ?
Key length max ? 68
Triggers ? Yes
Materialized Views ? Yes
Server Side Java Script ? No
Flexible Table(Schema) ? Yes
Stored Procedure ? Yes
Free edition ? Yes
User and Group role based security model ? Yes
Does your mom understand it ? No
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LMDB Microsoft SQL Server 2017
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