Contents
Which database is best for read-heavy?
TOP 10 Open Source Big Data Databases
- Cassandra. Originally developed by Facebook, this NoSQL database is now managed by the Apache Foundation.
- HBase. Another Apache project, HBase is the non-relational data store for Hadoop.
- MongoDB.
- Neo4j.
- CouchDB.
- OrientDB.
- Terrstore.
- FlockDB.
Which query is used to read data from a database?
Structured Query Language (SQL) is a specialized language for updating, deleting, and requesting information from databases. SQL is an ANSI and ISO standard, and is the de facto standard database query language.
How to read and write to SQL databases?
CTIGEEK over at Github also wrote a very nice module for sql server that does a lot of the heavy lifting ( https://github.com/ctigeek/InvokeQueryPowershellModule) Connecting to SQL Server: Create an encrypted password file then we pass that to a SQL connection command:
Is there a script to make a database read only?
In this post, I am sharing the script to make a database read-only or changing from read-only to the read-write mode of SQL Server. When we are attaching MDF or LDF files, sometimes the database status shows that the database is in Read-Only mode.
How to read and write from database in spark?
The method jdbc takes the following arguments and saves the dataframe object contents to the specified external table. For example, the sample code to save the dataframe ,where we read the properties from a configuration file. And load the values to dict and pass the python dict to the method.
Why is my database in read only mode?
When we are attaching MDF or LDF files, sometimes the database status shows that the database is in Read-Only mode. If we have some historical archive databases, we can also set the Read-Only mode to that database so that any database user can only read the database.