Decode in SQL This tutorial will help you to learn the use of SQL Decode function so as to add the if-then-else logic to your queries. We shall try to understand the Decode function, its syntax through examples. What is the use of the Decode Function in SQL? As we discussed earlier,...
DECODE function in Standard Query Language (SQL) is used to add procedural IF – THEN – ELSE like statements to a query. It compares a given expression with each search value one by one and returns a result on the basis of outcomes received from the comparison. A decode function basically...
Summary: in this tutorial, you will learn how to use the OracleDECODE()function to embed if-then-else logic in SQL queries. Introduction to Oracle DECODE() function# The OracleDECODE()function allows you to add the proceduralif-then-elselogic to the query. In the following example, the Or...
TERMINAL returns the operating system identifier for your current session's terminal. In distributed SQL statements, this attribute returns the identifier for your local session. In a distributed environment, this is supported only for remote SELECT statements, not for remote INSERT, UPDATE, or DELETE...
In this syntax, `crypt_str` is the encoded string, and `key_str` is the key used for decryption. Examples 1. Basic Decryption SELECTDECODE(ENCODE('Hello','mykey'),'mykey'); This example shows the decryption of the string 'Hello' that was encoded with the key 'mykey', returning the...
SQL Hive Decode is a powerful function in Apache Hive that allows conditional evaluation of expressions. It is similar to the CASE statement in SQL but with a more concise syntax. This article will introduce the syntax and usage of the SQL Hive Decode function, along with some code examples....
I will also compare DECODE() to CASE WHEN in Oracle and help you understand when to use each function. Finally, I will provide code for the equivalent transformations in SQL Server, PostgreSQL, and MySQL. Before we look at the practical examples, I recommend taking DataCamp’s Introduction ...
Behavior type Syntax Arguments Examples SQL reference Functions Data-type-specific functions String functions DECODE DECODECompares *expression *to each search value one by one. If *expression *is equal to a search, the function returns the corresponding result. If no match is found, the fun...
在Spark repo中的"examples/src/main/java/org/apache/spark/examples/sql/JavaSparkSQLExample.java"中找到完整的示例代码。 SparkSessionSpark 2.0中提供了对Hive功能的内置支持,包括使用HiveQL编写查询,访问Hive UDF以及从Hive表读取数据的功能。要使用这些功能,您无需拥有现有的Hive设置。 2.2.创建DataFrame 使用Spar...
Oracle / PLSQL: DECODE Function This Oracle tutorial explains how to use the Oracle/PLSQLDECODE functionwith syntax and examples. Description The Oracle/PLSQL DECODE function has the functionality of an IF-THEN-ELSE statement. Syntax The syntax for the DECODE function in Oracle/PLSQL is:...