Hive Aggregate Functions are the most used built-in functions that take a set of values and return a single value, when used with a group, it aggregates all values in each group and returns one value for each group. Like in SQL, Aggregate Functions in Hive can be used with…
Like any other Database Hive also supports Relation, Arithmetic and Logical operators. Keeps an eye on return values as they changes if one of the operand is NULL. Hive Relational OperatorsHive Logical OperatorsHive Arithmetic Operators Hive Relational Operators Below are Hive relational operators. Relational OperatorsDescriptionA = BReturns TRUE when A…
Hive supports several date types like Hive Numeric TypesHive Date & Time TypesHive String TypesHive Misc Types (Boolean & Binary)Hive Complex Types (Array, Map, Struct) Hive Numeric Types Below are Numeric Types Hive support and their sizes. Numeric TypesDescriptionTINYINT1-byte signed integer, from -128 to 127SMALLINT2-byte signed integer, from -32,768 to 32,767INT/INTEGER4-byte signed integer, from -2,147,483,648 to…
Hive comes with a set of collection functions to work with Map and Array data types. These functions are used to find the size of the array, map types, get all map keys, values, sort array, and finding if an element exists in an array. Related: Hive Date & Timestamp…
Use nvl() function in Hive to replace all NULL values of a column with a default value, In this article, I will explain with an example. You can use this function to Replace all NULL values with -1 or 0 or any number for the integer column.Replace all NULL values…
Hive conditional functions are used to apply a conditions on one or more columns and the conditions are executed for every row on a table. In this article you will learn Hive conditional functions with examples. Hive Conditional Functions List Select the link to know more about the function along…
Hive Date and Timestamp functions are used to manipulate Date and Time on HiveQL queries over Hive CLI, Beeline, Spark, Java, Python, and many more applications. The default date format of Hive is yyyy-MM-dd, and for Timestamp yyyy-MM-dd HH:mm:ss. When using Date and Timestamp in string formats, hive assumes these…
Hive supports several built-in string functions similar to SQL functions to manipulate the strings. These Hive string functions come in handy when you are doing transformations without bringing data into Spark and using String functions or any equivalent frameworks. In this article let's learn the most used String Functions syntax,…
Hive CAST(from_datatype as to_datatype) function is used to convert from one data type to another for example to cast String to Integer(int), String to Bigint, String to Decimal, Decimal to Int data types, and many more. This cast() function is referred to as the type conversion function which is used…
This section of the Apache Hive Tutorial explains step-by-step Apache Hive Installation and configuring on Ubuntu. Apache Hive needs Apache Hadoop Installation to be set up and running HDFS as Hive required HDFS to store the data files. Download and Install Apache Hive Download the Apache Hive from hive.apache.org, I…