Logging queries in PostgreSQL: a comprehensive guide How to list tables in Amazon Redshift Creating a user in PostgreSQL using PSQL Granting MySQL permissions: table and column levels What is SQL? 概要 How t
The term NoSQL originally could be taken at its word -- that is, SQL wasn't used as the application programming interface (API) to access data. However, the ubiquity and usefulness of SQL caused many NoSQL databases to add support for SQL. Today, it's commonly accepted that NoSQL stand...
PostgreSQL allows for the most common data types, including SQL 2008, and it supports Unicode, international character sets, and multibyte character encodings. PostgreSQL is an open-source license Because PostgreSQL is accessible as an open-source license, your users are empowered to be more ...
The v8.5 release of SSMA for SAP ASE is enhanced with support for Microsoft Entra/Azure AD authentication and basic support for JSON features in SQL Server, together with a targeted set of fixes designed to improve usability and performance. In addition, SSMA for SAP ASE now allows you to ...
Roles come with various attributes, some of which allow them to function like user accounts for logging into the database server. Below is an example of how to grant a role to another role: GRANT pg_monitor TO nagios; This makes the Nagios role a member of pg_monitor, whic...
Add basic support forhierarchyidtype in SQL Server. Address an issue with an unknown return type for a function called through synonym. Update ODP.NET to v19.3. SSMA v8.2 The v8.2 release of SSMA for Oracle is enhanced to: Add support forDBMS_OUTPUT.ENABLE/DISABLE. ...
WAL:Write-ahead-logging,预写式日志,在写入更新数据前先写日志,保证数据可靠性 SSTable:磁盘中的数据结构,持久化在磁盘的有序键值对集合 除了上面说的这几个模块,图中还有几个数据流向也是很关键的: full:memtable 满了之后就会转换成 immutable memtable ...
Database access language.The DBMS must also provide an API to access the data, typically in the form of a database access language that can be used to modify data but also create database objects and secure and authorize access to the data. SQL is an example of a database access languag...
Once a user account is created on an SQL node, the user and its privileges can be stored in NDB and thus shared between all SQL nodes in the cluster by issuing a GRANT statement such as this one: GRANT NDB_STORED_USER ON *.* TO 'jon'@'localhost'; NDB_STORED_USER always has glob...
Using writeset information for conflict detection has been found to cause issues with dependency tracking; for this reason, we now limit the usage of writesets for conflict checks to when row-based logging is in effect. This means that, in such cases, binlog_format must be ROW, and MIXED...