SQLite is a widely-used lightweight database engine that powers many mobile, embedded, and desktop applications. One of its key features is its dynamic type system, which allows flexibility in handling data. While this is advantageous in many scenarios, there are cases where developers need precise control over how data is treated or converted between types. This is where SQLite’s CAST() expression comes in.
Tag: conversion functions
How CAST() Works in MySQL
In MySQL, CAST() is a built in function that converts a value to another data type. It takes a value of one type and returns a value of the specified type.
You provide the value as an argument when you call the function, as well as the type that you’d like it converted to.
CAST() works similar to CONVERT(), except that the syntax used is slightly different.
How CONVERT() Works in MySQL
In MySQL, CONVERT() is a built in function that converts a value to another data type. It takes a value of one type and returns a value of the specified type.
We provide the value as an argument when we call the function, as well as the type that we want it converted to.
The CONVERT() function is similar to the CAST() function, which also converts between data types.
How TRY_CAST() Works in SQL Server
In SQL Server, an often used function is CAST(), which converts an expression of one data type to another. But if the cast doesn’t succeed, then it returns an error.
Enter TRY_CAST().
The TRY_CAST() function doesn’t return an error if the cast fails. Instead, it returns NULL.
There are some occasions however, where it will return an error.
Continue readingHow TRY_CONVERT() Works in SQL Server
In SQL Server, the TRY_CONVERT() function is very similar to the CONVERT() function, except that TRY_CONVERT() doesn’t return an error if the conversion fails (CONVERT() does).
Instead, the TRY_CONVERT() function returns NULL if the conversion doesn’t succeed.
There are some occasions however, where TRY_CONVERT() will return an error.
CONVERT() in SQL Server
In SQL Server, the CONVERT() function converts an expression of one data type to another.
Here’s a quick overview of the function with examples.
Continue readingHow CAST() Works in SQL Server
In SQL Server, the CAST() function converts an expression of one data type to another.
Here’s a quick overview of the function with examples.
Continue readingROWIDTONCHAR() Function in Oracle
In Oracle Database, the ROWIDTONCHAR() function converts a ROWID value to NVARCHAR2 data type
It’s similar to the ROWIDTOCHAR() function, except that ROWIDTOCHAR() converts a ROWID value to VARCHAR2 data type.
ROWIDTOCHAR() Function in Oracle
In Oracle Database, the ROWIDTOCHAR() function converts a ROWID value to VARCHAR2 data type.
CHARTOROWID() Function in Oracle
In Oracle Database, the CHARTOROWID() function converts a string value to ROWID data type.