Optimization

Querying databases
Querying databases
In database terms, a query is used to retrieve data from the database. Queries are one of the things that make databases so powerful. A query refers to the action of retrieving data from your database. Usually, you will be selective…
Oracle database Size query
Oracle database Size query
Now that Oracle Database 12.1.0.2 has been officially released, I can finally start sharing more technical details on how Oracle Database In-Memory (Database In-Memory) works. I thought we should start this series of posts right at…
Database query examples
Database query examples
This section provides several examples of queries based on the concepts that have been discussed. The hour begins with the simplest query you can issue, and builds upon the initial query progressively. You use the EMPLOYEE_TBL table. Selecting all records from a table and displaying all columns: SELECT…
Program for database
Program for database
Many tasks in an integrated programming environment require access to program information for their implementation. Program Database Toolkit (PDT) is a framework for analyzing source code written in several programming languages and for making rich program knowledge accessible to developers of static…
Query for creating database in mysql
Query for creating database in mysql
The menagerie database is simple (deliberately), but it is not difficult to think of real-world situations in which a similar type of database might be used. For example, a database like this could be used by a farmer to keep track of livestock, or by a veterinarian to keep track of patient records…
Oracle database design tools
Oracle database design tools
Being able to show what you know and can do helps differentiate you from the competition–whether you are preparing for college, applying to a graduate program, or competing for a job, internship or promotion. Oracle Academy’s courses align to Oracle professional certifications offered through Oracle…
How to view MySQL database in windows?
How to view MySQL database in windows?
Earlier today at the Microsoft Build 2017 conference in Seattle, Scott Guthrie announced two new offerings to the Azure Database Services Platform, Azure Database for MySQL and Azure Database for PostgreSQL. Today I’ll be talking about our MySQL offering – a little bit about our journey, the architecture…
PostgreSQL database browser
PostgreSQL database browser
The PostgreSQL data browser provides a management tool for your deployment in the Compose Console. Listed are all the databases in your deployment along with their size. The default database at deployment creation is named compose. Database list on the data browser page. If you wish to create other databases…
Free database solutions
Free database solutions
Supporters of license plate readers are fond of saying that unless you’re a criminal, you needn’t fear the invasive technology. But those who adhere to that argument should consider just a few examples from around the country: The DEA contemplated using license plate readers to monitor people who were…
MySQL database management tool
MySQL database management tool
Database management tools provide a web interface for the administration of databases. The tools also allow running SQL queries from this user interface. Plesk is shipped with the following database management tools: phpMyAdmin is used for MySQL databases. phpPgAdmin is used for PostgreSQL databases…
firebird db viewer
firebird db viewer
The RPM Remote Print Manager service will not run. It starts, then immediately stops. The RPM User Interface reports Error Getting License . An entry can be found in the Windows Event Viewer for RPM Remote Print Manager. Cause There is a known limitation in the Firebird Database related to Transaction…
dbvisualizer for mac
dbvisualizer for mac
DbVisualizer Is a cross-platform database tool that aims to increase user productivity. It offers a single solution to speed development, testing and administration of relational databases. For developers, DbVisualizer offers a range of tools to assist database development and perform tasks such as object…
free db viewer
free db viewer
Datum is a fast modern database viewer. This has all the features and speed of it s predecessor and is FREE! Quickly view your data and modifying table schema. This app is perfect for anyone who deals with SQLite. Especially those who are just looking to browse or only need to import or export data as…
Database Normalization process
Database Normalization process
Find out what normalization is and how your database can benefit from it (or suffer from it). Learn the advantages, disadvantages, and some techniques and guidelines to doing it yourself. In this hour, you learn the process of taking a raw database and breaking it into logical units called tables. This…
Mysql ignoring query to other database
Mysql ignoring query to other database
replicate-ignore-db applies only to the default database (determined by the USE statement). Because the database was specified explicitly in the statement, the statement has not been replicated. My advice is to change the context with a USE instead of explicitly specify the database in the statement…
Parallel processing in oracle database 11G
Parallel processing in oracle database 11G
Today s widespread use of dual and quad core processors means that even the humblest of modern computers running an Oracle database will contain more than one CPU. Although desktop and laptop computers might have only a single disk device, database server systems typically have database files spread—…
Query multiple databases
Query multiple databases
If the serial is on the main table from EACH database, then you can just join the tables together using the fully qualified name: CREATE VIEW vWhatever AS SELECT (whatever you want to select) FROM [Database A].[schema - usually dbo].DSNA_tblMaiin AS a JOIN [Database B].[dbo].DSNB_tblMaiin AS b ON a.Serialnumber…
how to query sql database
how to query sql database
Open SQL Server Management Studio. In the Connect to Server dialog box, enter the following information: Setting       Suggested value Description  Server type Database engine This value is required. Server name The fully qualified server name The name should be something like this: mynewserver20170313.database.windows.net…
database update query
database update query
SQL Server (starting with 2008)Azure SQL DatabaseAzure SQL Data Warehouse Parallel Data Warehouse Updates query optimization statistics on a table or indexed view. By default, the query optimizer already updates statistics as necessary to improve the query plan; in some cases you can improve query performance…
Flowchart database symbol
Flowchart database symbol
Each variety of flowchart shape has its own specific meaning. While you can create a flowchart online using only the most common symbol types, knowing how to make a flowchart using them all can come in handy. We’re here to help. Welcome to Gliffy’s guide to understanding flowchart symbols. Basic Flowchart…
Northwind database queries
Northwind database queries
2. Sales by Year This query shows how to get the year part from Shipped_Date column. A subtotal is calculated by a sub-query for each order. The sub-query forms a table and then joined with the Orders table. select distinct date(a.ShippedDate) as ShippedDate, a.OrderID, b.Subtotal, year(a.ShippedDate)…