Postgresql cast int to string how to#

This time we will try to convert the bike_number column into the DOUBLE PRECISION data type: SELECT CAST(bike_number AS DOUBLE PRECISION) FROM bike_details

Let’s consider the same bike_details table: SELECT * FROM bike_details Trying to convert an expression that cannot be converted to the specified data type will generate an error. DOUBLE PRECISION.Įxample #5: Invalid Type Conversion in Postgres? The selected column has been converted into the desired data type i.e. Let’s execute the below statement to convert the TEXT data type to DOUBLE PRECISION data type: SELECT CAST(bike_price AS DOUBLE PRECISION) FROM bike_details The bike_price column has a TEXT data type. In our example database, we have created a bike_details table that contains following records: SELECT * FROM bike_details

Postgresql cast int to string how to#

The data type of published_date column has been converted to the DATE type.Įxample #4: How to Use a CAST Operator to Convert a String Into a Double Type? Let’s convert it into DATE type using the CAST operator: SELECT CAST(published_date AS DATE) FROM article_details The published_date column has a text data type. Let’s execute the SELECT query to get the table’s details: SELECT * FROM article_details We have created a table named article_details in our database.

The output shows that the data type of team_rating column has been changed to INTEGER data type.Įxample #3: How to Use CAST Operator For String to Date Type Conversion? Let’s convert it into INTEGER data type using the CAST operator: SELECT CAST(team_rating AS INTEGER) The result set shows that the team_rating column has a TEXT data type. Let’s run the SELECT statement to get the table’s details: SELECT * FROM team_details We have created a table named team_details. The output proves that the CAST operator takes a constant string and converts it into the desired data type, i.e., integer.Įxample #2: How to Use the CAST Operator to Table’s Column? Run the below statement to convert the given constant string to an integer: SELECT CAST ('572' AS INTEGER) The given expression will be converted into the targeted data type.Įxample #1: How to Use CAST Operator to Convert/Cast a String to Integer? While data_type represents a targeted data type. Here, exp represents an expression to be evaluated, such as a table’s column, an expression, or a constant. The below snippet illustrates the basic syntax of the CAST operator: CAST (exp AS data_type) How to Use the CAST Operator in PostgreSQL? Using practical examples, this post will explain how the CAST operator works in PostgreSQL. For this purpose, PostgreSQL provides a CAST operator that assists us in converting one data type to another. For instance, converting a numeric string into an int, a string to date, etc. In Postgresql, to cast or convert from int to float, pass the first value as an integer and second value data type that is float.While working with PostgreSQL, we may encounter a situation where we need to convert one data type into another. Read: Postgresql date_trunc function PostgreSQL cast int to float Using inbuilt functions: The last way is to use the inbuilt function like to_char, to_date, to_timestamp.Using the ( VALUE::TYPE ) notation: We also called it typecast operator in Postgresql.īefore the operator, write the value that we want to convert, and after the operator write the data type that we want to apply to the value.Using the cast( ) function: This function accepts two things in its parenthesis, the first is a value that we want to convert, and the second is the data type like INTEGER, FLOAT, BOOLEAN.There are three ways to cast the value in Postgresql. We might want to convert it into a numeric data type, for that we will use the cast function of Postgresql that helps in converting data from one type to another. We may have the data or column that has a text data type and we want to perform some calculation on that, but it is not possible with the text data type. When we have data stored in Postgresql database and we want to convert the data type of some value or column of the table into another data type like int.