Menu
Since 1998, DevX has helped people start businesses, build websites, and provide enterprise technology to people globally. Interviewing the likes of Microsoft’s co-founder, Steve Ballmer, the publication brings comprehensive, reliable, and accessible insights to the Internet.
Using sys.dm_db_missing_index_group_stats?returns summary information about groups of missing indexes, excluding spatial indexes. An example follows: SELECT TOP 5 * FROM sys.dm_db_missing_index_group_stats ORDER BY avg_total_user_cost * avg_user_impact * (user_seeks + user_scans)
TODOs are a quick way to jot down action items while coding. It can also sometimes become cumbersome to locate all TODOs for further action. Visual Studio provides a way
A typical mechanism of converting to a string, traversing and counting has a lot of processing to complete. Instead, the code below shows a combination of methods in Math package
The Microsoft.AspNetCore.Http.StatusCodes?enum has many response codes. Please see below for an example to return one of the values from the enum: [HttpGet]public IActionResult CustomStatusCode (){ //code”return StatusCode(Microsoft.AspNetCore.Http.StatusCodes.Status405MethodNotAllowed);}
Set up HickariCP number of connections in SpringBoot, in application.properties: spring.datasource.hikari.maximumPoolSize=8spring.datasource.hikari.minimumIdle=8
Getting to know the available drive types in the system is essential for certain activities in Java. The following code snippet lists the available drive types in the system: */import
Starting with JDK 12, the “switch” statement is extended so that it can be used as either a statement or an expression. A sample: switch (day) { case MONDAY, FRIDAY,
The DATALENGTH SQL returns the length of columns in a table. SELECT length = DATALENGTH(ColumnName) FROM TableName ORDER BY ColumnName
Visual Studio allows you to communicate with fellow developers about a piece of code. It lets you add a compiler directive “warning” to your code, which shows up in the
Eclipse Memory Analyzer (MAT) is a powerful tool for heap dump analysis. It has several great features to debug memory problems effectively. ‘Incoming references’ and ‘outgoing references’ is one such
See how to empower MySQL to send the batched statements in a single request???or as much as possible in a single request: via rewriteBatchedStatements = true:JDBC URL = …?rewriteBatchedStatements=true
SQL Server automatically loads the data it needs to work with into its cache. This is called pages. These data pages stay in SQL Server’s cache until there is no
You can use the SHA1Managed class and compute hash for an input string as shown below. It is done in two steps. First, is to get the byte array after
Using error: Class names, ‘YourClassName’, is only accepted if annotation processing is explicitly requested. There are likely instances that you have come across this error and found it very difficult
To create a new date, you will need a Calendar instance and then you can set the Calendar instance to the date you need. Calendar calendar = Calendar.getInstance(); The line
Developers take advantage of the JVM argument -XX:+UseGCLogFileRotation to rotate GC log files. Example: “-XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:/home/GCEASY/gc.log -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=20M” As per above example, JVM will rotate GC log file whenever its size reaches 20MB. It will generate files up to 5 files, with extensions gc.log.0, gc.log.1, gc.log.2, gc.log.3, gc.log.4.
Compress: Compresses input data and returns the binary data of type VARBINARY(MAX) Decompress: Decompresses compressed input binary data and returns the binary data of type VARBINARY(MAX) Here is small example
We use the hover attribute to set the hover effect in Web pages within CSS. For example: div {color:#000;}div :hover{color:#f00;} You can apply the transaction property on top of this with
Proper formatting of output is essential. There are times when the details presented are not formatted. The code snippet below displays details in a formatted manner that is a better
Oftentimes, the input is an integer that has to be converted to the appropriate enum value. All we have to do is cast the integer value as below: EnumName e
This is sort of like cheating the Java runtime. Ideally, I believe, starting Java 1.6, you cannot execute Java programs without a standard main method. Prior to that, only the
See how to log HikariCP activity in Spring Boot. In the application.properties employ the following: logging.level.com.zaxxer.hikari.HikariConfig=DEBUGlogging.level.com.zaxxer.hikari=TRACE
There are two ways to prevent your SQL code from running on a testing or production server. You can use the @@SERVERNAME Variable or the DB_NAME function, as shown next
There are many cases in which we need to create GUIDs. You can now create them using Visual Studio tools. Go to Tools – Create Guid. This will bring up
MySQL has user management and user privileges can be created and modified by the database administrators???or users with administration rights. In my environment, this is the result of the command:
Reading all lines of a file from classpath in Java 8 and display on screen: Files.lines(Paths.get(ClassLoader.getSystemResource(“filename.extension”) .toURI())).forEach(System.out::println);
You can transfer data with JSON in SQL Server. Based on an SQL query, you can output the results into JSON format. Here is a small example: DECLARE @JSONOutput NVARCHAR(MAX)
The BitConvertor class can convert a byte array to a string in C#, as shown below: string convertedValue = BitConverter.ToString(byteArray).Replace(“-“,””);
At times, we need a certain combination of column values to be unique in a table. With MySQL, this can be achieved using the UNIQUE keyword. There can be a
Use the asterisk (*) symbol as a prefix to select all elements of a selector object and then write your CSS styles on top of it. For example: *div would
