Frequent question: What is set type in MySQL?

What is SET datatype in SQL?

The SET datatype is a string type, but is often referred to as a complex type due to the increased complexity involved in implementing them. A SET datatype can hold any number of strings from a predefined list of strings specified during table creation.

What SET data types?

In computer science, a set is an abstract data type that can store unique values, without any particular order. It is a computer implementation of the mathematical concept of a finite set. … Other variants, called dynamic or mutable sets, allow also the insertion and deletion of elements from the set.

WHAT IS SET command in MySQL?

The SET command is used with UPDATE to specify which columns and values that should be updated in a table.

Is SET a string type in MySQL?

The string data types are CHAR , VARCHAR , BINARY , VARBINARY , BLOB , TEXT , ENUM , and SET . In some cases, MySQL may change a string column to a type different from that given in a CREATE TABLE or ALTER TABLE statement.

What is JSON data type in MySQL?

MySQL supports a native JSON data type defined by RFC 7159 that enables efficient access to data in JSON (JavaScript Object Notation) documents. … JSON documents stored in JSON columns are converted to an internal format that permits quick read access to document elements.

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What is float data type?

In computer science, a float is a data type composed of a number that is not an integer, because it includes a fraction represented in decimal format. … Some point out that the float data type is used in computer programming when more precision is needed than what integers can provide.

What are 4 types of data?

4 Types of Data: Nominal, Ordinal, Discrete, Continuous

  • These are usually extracted from audio, images, or text medium. …
  • The key thing is that there can be an infinite number of values a feature can take. …
  • The numerical values which fall under are integers or whole numbers are placed under this category.

What are 2 types of data?

The Two Main Flavors of Data: Qualitative and Quantitative

At the highest level, two kinds of data exist: quantitative and qualitative.

What is ENUM data type in MySQL?

An ENUM is a string object with a value chosen from a list of permitted values that are enumerated explicitly in the column specification at table creation time.

WHAT IS SET command?

SET (Set Environment)

The SET command is used to set values that will be used by programs. DOS holds the set strings in the area of memory reserved for the environment (if the string already exists in the environment, it is replaced).

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