什么是 LSM 虽然大家都是叫它 LSM 树,听着很像是一个树状的数据结构,但严格意义上,它是一种存储结构,全称Log-Structured-Merge-Tree,即日志结构合并树 很多NoSQL存储都是采用 LSM 树进行支撑的,如HBase、LevelDB、RocksDB 等 它的核心其实是牺牲部分读性能(存储分层设计),追求更好的写性能(顺序写) 那么问题...
A free graphical user interface, Oracle SQL Developer allows database users and administrators to do their database tasks in fewer clicks and keystrokes. A productivity tool, SQL Developer's main objective is to help the end user save time and maximize the return on investment in the Oracle Da...
This article will show how triggers, indexes, constraints and foreign keys will replicate in snapshot and after snapshot in SQL Server replication. Merge replication is used to replicate data from a publisher to a subscriber database and vice versa. Recently someone at our workplace came to ...
A free graphical user interface, Oracle SQL Developer allows database users and administrators to do their database tasks in fewer clicks and keystrokes. A productivity tool, SQL Developer's main objective is to help the end user save time and maximize the return on investment in the Oracle Da...
Any shaping is one-off and not repeatableWhen using Power Query to access and transform data, you define a repeatable process (query) that can be easily refreshed in the future to get up-to-date data. In the event that you need to modify the process or query to account for underlying ...
We have added support to SQL Server 2022 from SSDT version 17.5 and with 17.6, we have brought the advanced functionalities that are provided by SQL Server 2022. Ledger in SQL Server for SSDT Usingledger, the data in SQL is verifiable using the same integrity benefits seen in blockchain tech...
Oracle Database SQL Reference Better linking in online documentation Many of the cross-references from this book to other books have been made more specific, so that they link to a particular place within another book rather than to the table of contents. Because this is an ongoing project, ...
How to archive SCD type 2 functionality using Merge in SQL server how to auto shrink the transcation log files >1GB how to automate the process of generating scripts for database objects How to avoid SUSPENDED Status for my SPID running a Select statement? How To Avoid Table Scan how to a...
In Upload options "Local Changes" entry links to the incorrect URL for Documentation (COLLAB-11300) 14.6.14607 - January 7, 2025 Bug Fixes: Fix Bitbucket merge issue, when review is completed and linked Jira ticket is deleted/review link removed. (COLLAB-11206) ...
“committer” is an engineer who has the “commit bit” to merge changes into the Postgres core, equivalent to to the term “maintainer” in other open source projects)—because not only did our Postgres committers commit their own work in Postgres 17, butalmost a third...