Is DynamoDB table name unique?
How to relate tables in dynamodb
- How to relate tables in dynamodb
- What is a table in AWS?
- How does DynamoDB work?
- What type of database is DynamoDB?
- Dynamodb sql
- What is a primary key in Amazon DynamoDB?
- What allows us to write globally from any region to DynamoDB?
- What is the use of the Sort Key in DynamoDB?
- Dynamodb pricing
- How many Amazon RDS database instances?
- What is S3 and how does it work?
- What is Amazon Redshift ODBC Driver?
Tables, attributes and other DynamoDB objects must have names. Names should be meaningful and concise; for example, Products, Books, and Authors are names that clearly indicate their meaning.
DynamoDB has a list of reserved words and special characters. For a complete list of DynamoDB reserved words, see DynamoDB Reserved Words. Also the following characters have special meaning in DynamoDB: # (hash) and : (colon).
Although DynamoDB allows you to use these reserved words and special characters in names, we recommend that you avoid doing so, because you would have to define placeholder variables every time you use these names in an expression. For more information, see Expression Attribute Names in DynamoDB.
When creating a table or secondary index, you must specify the names and data types of each of the primary key attributes (partition key and sort key). In addition, each primary key attribute must be defined as a String, Number or Binary type.
What is a table in AWS?
Tables are the fundamental data structures in both relational databases and Amazon DynamoDB. A relational database management system (RDBMS) requires you to define the schema of the table when you create it.
How does DynamoDB work?
DynamoDB makes every effort to determine who performed the last write. With this conflict resolution mechanism, all replicas will agree on the last update and converge to a state in which they all have identical data.
What type of database is DynamoDB?
Amazon DynamoDB is a fully managed serverless key-value NoSQL database that is designed to run high-performance applications at any scale.
DynamoDB allows the specification of secondary indexes to assist in this type of query. Secondary indexes can be global, meaning the index spans the entire table across hash keys, or local, meaning the index would exist within each hash key partition, requiring the hash key to also be specified when querying.
@pkaeding is right. You can get records prior to a specific date by scanning , but you can’t get them in sorted order. GSI will not help you in this case. It is not possible to sort the partition key , nor is it possible to query only the range key .
For those of you confused. THIS ANSWER IS INCORRECT. Your original answer is correct but your updated answer is not. Read Warren Parad’s answer below. It is correct.
@MikeBrant I want to query (not scan, which looks at each table element, which makes it very inefficient and expensive) a table on the GSI hash key of a table (CreatedAt) using the greater than symbol. As far as I know, this cannot be done.
What is a primary key in Amazon DynamoDB?
The primary key uniquely identifies each item in the table, so no two items can have the same key. DynamoDB supports two different types of primary key: Partition key: a simple primary key consisting of a single attribute called partition key.
What allows us to write globally from any region to DynamoDB?
Global tables allow you to read and write your data locally by providing single-digit millisecond latency for your globally distributed application at any scale. … You can simply select the regions where you need your data replicated and DynamoDB takes care of the rest.
What is the use of the Sort Key in DynamoDB?
Sort keys are not only used to group and organize data, but also to provide additional means of querying elements in a table.
Deliver applications with consistent single-digit millisecond performance, virtually unlimited processing and storage capacity, and automatic replication across multiple regions.
Focus on innovation and optimize costs with a fully managed serverless database that automatically scales vertically and horizontally to fit your needs.
Build Internet-scale applications that support caching and user content metadata that require high concurrency and connections for millions of users and millions of requests per second.
Scale the throughput and concurrency of multimedia and entertainment workloads, such as interactive content and real-time video streaming, and deliver lower latency with multi-region replication across AWS regions.
How many Amazon RDS database instances?
Q: How many DB Instances can I run with Amazon RDS? By default, customers can have up to a total of 40 database instances on Amazon RDS. Of the 40, up to 10 can be Oracle or SQL Server DB instances with the “License Included” model.
What is S3 and how does it work?
Amazon S3 is an object storage service built to store and retrieve any volume of data from any location. It is a simple storage service that offers excellent durability, availability, performance, security and virtually unlimited scalability at very low costs.
What is Amazon Redshift ODBC Driver?
Amazon Redshift provides 64-bit ODBC drivers for Linux, Windows and macOS X operating systems. The 32-bit ODBC drivers are discontinued. No further updates will be released, except for urgent security patches.
Any change to any element in any table replica will be replicated to all other replicas in the same global table. In a global table, an element that has just been written will normally propagate to all table replicas within seconds.
An application can read and write data to any table replica. If the application only uses eventually consistent read operations and only performs read operations on one AWS region, it will work without any modifications. However, if the application requires high consistent read operations, it must perform all high consistent read and write operations on the same region. DynamoDB does not support high consistent reads in all regions. Therefore, if you perform a write in one region and a read in another, it is possible that the read response will include stale data that does not reflect the results of recently completed write operations in the other region.