Dear Friends, SQL is most common used language in Oracle application. Lets read about it SQL stands for Structured Query Language and is the standard relational language that is supported by just about every database product. All database professionals should know how to write, troubleshoot, and optimize SQL. SQL: SELECT STATEMENT This SQL tutorial explains how to use the SQL SELECT statement with syntax, examples, and practice exercises. DESCRIPTION The SQL SELECT statement is used to retrieve records from one or more tables in your SQL database. SYNTAX The syntax for the SQL SELECT statement is: SELECT expressions FROM tables WHERE conditions; Parameters or Arguments expressions The columns or calculations that you wish to retrieve. tables The tables that you wish to retrieve records from. There must be at least one table listed in the FROM clause. conditions The conditions that must be met for the records to b...
Dear Friends, This is a basic question asked by any interviewer why 4 extra pin used in a power supply. So this is the main reason to use them,,,,,, CONNECTING A 20-PIN PSU TO A 24-PIN BOARD. Technically, a 20-pin ATX connector can be plugged straight into a 24-pin motherboard socket, leaving pins 11, 12, 23, and 24 unconnected. The four pins that you are leaving open are just redundant lines for higher current capability to ATX connectors and pinouts). The power connector is polarized, so it's difficult to insert it wrong into the header unless you force it really hard. Nevertheless, double check that pin 1 goes into pin 1. However, power supply compatibility is not merely a mechanical issue. There was obviously a good reason to add extra four wires to the main cable-- it was done to support higher current requirements. If you exceed current rating of a connector, it may overheat and even melt. Since the Molex power connector is rated at 6 amps per circuit, with 20-...
The Java Tutorials are practical guides for programmers who want to use the Java programming language to create applications. They include hundreds of complete, working examples, and dozens of lessons. Groups of related lessons are organized into "trails".The Java Tutorials primarily describe features in Java SE 8. For best results, download JDK 8 . What's New The Java Tutorials are continuously updated to keep up with changes to the Java Platform and to incorporate feedback from our readers. This release of the tutorial corresponds to the JDK 8u40 release. This release includes a new lesson in the Deployment trail that describes how to use the Java packaging tools to generate self-contained applications. Self-contained applications are Java applications that are bundled with the JRE that is needed to run. These applications are installed on a user's local drive and launched in the same way as native applications. See Deploying Self-Contained Applications fo...
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