Database Administrator

Nodejs + mysql get the automatically generated id when inserting a record, nodejsmysql Recently, when writing the back-end interface of the student reporting project, we found that the primary key automatically generated by the database needs to be

Your database is in crisis. Original English:Your Database: The Threat That Lies We have already paid full attention to databases, so they should not be IT risk factors. However, even if the DRP (disaster recovery plan) has a budget, backup

What Is New in MySQL 5.7 (New Features of MySQL 5.7), mysql5.7 1.4 What Is New in MySQL 5.7 1.4 New Features of MySQL 5.7 This section summarizes what has been added to, deprecated in, and removed from MySQL 5.7. This section summarizes the

Aerospike C client manual --- key-value storage-delete record, aerospike ClientDelete record The API of the Aerospike C client provides a simple operation to delete data in the database. Sample Code of data deletion is used by all samples. The

How to modify the character encoding of mysql 5.6.24 decompressed (Installation-free or zip), mysql 5.6.24   [It takes nearly three hours to solve the default encoding problem of this character. The modification method provided on the Internet is

SQL is a simple way to improve the efficiency, and SQL improves the efficiency Use less in operations (very inefficient) and replace tables as much as possible Select should specify the column, not * (* will read all data, while the specified

What is the difference between the set and select assignment modes in SQL ?, Sqlselect The variables in the T-SQL are divided into local variables and global variables, the use of local variables is first declared, and then assigned a value. Global

JSON of report data source, json of report JSON is widely used as a lightweight data format. It is also common for reports to read json data sources for report development. In addition, some reports also receive data from HTTP servers for report

SQL Server recursive query and SQL Server recursive query -- SQL Server recursive query, mainly used to create a tree structure IF OBJECT_ID ('category') IS NOT NULL DROP TABLE CategoriesGOCREATE TABLE Categories (CategoryID INT, CategoryName

Database indexing technology, database indexingTechnical Principle index is a structure that sorts the values of one or more columns in a database table (for example, the name column of the employee table. If you want to search for him or her by the

Database (first paradigm, second paradigm, third paradigm), Database paradigm Database (first, second, and third) Paradigm: the English name is Normal Form, which is E. f. codd was summarized after the relational database model was proposed in the 19

Event ID 18456: User Logon Failed. Cause: Token-based server access Verification Failed, with a infrastructure error, 18456 token Event Type: Audit Failed Event Source: MSSQLSERVEREvent Type: LogonEvent ID: 18456Date:Event: 11:11:21User: domain \

Oracl X64 and plsql miscellaneous, oraclplsql First install orcal X64. Configure \ tnsnames. ora with orcal NetManger. After installation, use sqlplus to check whether the client has been installed. Enter sqlplus and prompt to enter the user

Two MHA switching exceptions (masterha_master_switch line 53) and 2konline game environment exceptions In the process of testing manual failover and online failover, MHA encountered two strange problems, and the test was not successful when calling

Oracle queries fields by field type and oracle Field Type Sometimes we need to query specific field information in oracle through the field name, field type, field length, field comment, table name. For example, my colleague asked me yesterday if

Automatic PostgreSQL backup tutorial in Windows and postgresql backup tutorial BackgroundAn automated system is required for my work on a PostgreSQL database project to perform backups every day. After some research, we decided to create a Windows

Set CA certificate to enhance PostgreSQL Security tutorial, capostgresql After many experiments, I finally successfully implemented the SSL certificate authentication function. Therefore, I want to record these steps for future reference. For

Note the following when using the date type in PostgreSQL: postgresql date Those of us who use Rails will not be surprised when they see 5. weeks. from_nowor3.days.ago + 2. hours. Similarly, PostgreSQL can also achieve the same functionality by

When using array values in PostgreSQL, note that the postgresql Array In Heap, we rely on PostgreSQL to support most backend heavy tasks. We store each event as an hstore blob. We maintain a PostgreSQL array of completed events for each tracked user,

Describes the jsonb data type in PostgreSQL, postgresqljsonb PostgreSQL 9.4 is loading a new feature called jsonb, which is a new type of data that can store JSON data that supports GIN indexes. In other words, the most important feature in the