Below is a quick example of formatting a number as a percentage in MariaDB.
Continue readingAuthor: Ian
Add Leading Zeros in SQL
Below are examples of adding a leading zero to a number in SQL, using various DBMSs.
Continue readingFormat a Number as a Percentage in Oracle
Even though Oracle Database has a TO_CHAR(number) function that allows us to format numbers, it doesn’t provide a format element for the percentage sign.
Therefore, if we want to format a number as a percentage in Oracle Database, we need to concatenate the percentage sign and the number.
Continue readingFormat a Number as a Percentage in MySQL
In MySQL, we can format a number as a percentage by concatenating the number with the percent sign.
The CONCAT() function concatenates its arguments. We can pass the number as the first argument, and the percent sign as the second.
2 Ways to Add a Percent Sign to a Number in SQLite
Here are two ways to format a number as a percentage in SQLite.
Continue readingHow to Export Query Results to a .txt File when using SQLcl (Oracle)
When querying Oracle Database, you can use the SPOOL command to export your query results to a text file when using SQLcl.
How to Remove the Trailing Spaces after the Month Name in Oracle
If you’ve ever used the TO_CHAR() function to format a date that uses the month name, you might have noticed that sometimes the month is returned with right padding.
INSTR() Equivalent in SQL Server
Many RDBMSs have an INSTR() function that enables us to find a substring within a string. Some (such as MySQL and MariaDB) also have a LOCATE() function and a POSITION() function (also supported by PostgreSQL), that do a similar thing.
SQL Server doesn’t have an INSTR() function. Nor does it have a LOCATE() or POSITION() function. But it does have the CHARINDEX() function that does the same thing.
SQL Server also has the PATINDEX() function, which does a similar job to CHARINDEX().
3 Ways to Separate the Year, Month, and Day from a Date in MariaDB
MariaDB has several functions that enable you to extract various date and time parts from date/time values. You can use these to separate each date/time component into its own column if required.
Below are three ways to extract the year, month, and day from a date value in MariaDB.
Continue readingGROUP_CONCAT() Function in MySQL
MySQL has a GROUP_CONCAT() function that enables us to return columns from a query as a delimited list.
It returns a string result with the concatenated non-NULL values from a group.