syntax:types
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| syntax:types [2016/11/21 21:35] – dmitry | syntax:types [2019/11/02 07:45] – [Sort order] dmitry | ||
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| Any value in EasyMorph can be either number or text or boolean or error. Unlike databases, one column of a table in EasyMorph can hold values of different types, similarly to Excel. Although, keep in mind that most [[syntax: | Any value in EasyMorph can be either number or text or boolean or error. Unlike databases, one column of a table in EasyMorph can hold values of different types, similarly to Excel. Although, keep in mind that most [[syntax: | ||
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| ==== Numbers ==== | ==== Numbers ==== | ||
| Numbers are either integer or decimal numbers with fixed decimal point. Floating point numbers are not supported. Effective range is (-7.9 x 10< | Numbers are either integer or decimal numbers with fixed decimal point. Floating point numbers are not supported. Effective range is (-7.9 x 10< | ||
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| - | To convert text values to numbers see [[syntax: | + | To convert text values to numbers see the [[syntax: |
| + | ==== Dates ==== | ||
| + | Notice that there is no dedicated type for dates in EasyMorph. Instead, as in Excel, dates are numbers, but only formatted as dates. Such number date represents a number of days since January 1st, 1900. For instance 42680 corresponds to November 6th, 2016, because there are 42680 days from January 1st, 1900 to that date. | ||
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| + | Dates in expressions can be specified using date literals. A date literal has format # | ||
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| + | is the same as 42680 and corresponds to November 6th, 2016. Here is an example of date literals in a condition: | ||
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| + | Because dates are numbers, there is no need in using a special function for adding days. To get the next day just add 1. However, there is a special function for adding months — [[syntax: | ||
| ==== Text ==== | ==== Text ==== | ||
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| Note: Ampersand (&) is the text concatenation operator. | Note: Ampersand (&) is the text concatenation operator. | ||
| - | To convert | + | To convert |
| ==== Boolean ==== | ==== Boolean ==== | ||
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| ==== Error ==== | ==== Error ==== | ||
| - | Error is a special value that indicates incorrect calculation. It can only be a result of an expression. You can check if a value is an error using [[syntax: | + | Error is a special value that indicates incorrect calculation. It can only be a result of an expression. You can check if a value is an error using the [[syntax: |
| + | |||
| + | You can also create an error values use the [[syntax: | ||
| ==== Empty values ==== | ==== Empty values ==== | ||
| - | If a table cell has no value - it's so called //empty value//. You can check if a column value is empty using [[syntax: | + | If a table cell has no value - it' |
| Empty values are somewhat similar to nulls in relational databases but not exactly. For instance an empty value always equals to another empty value and equals to empty string. | Empty values are somewhat similar to nulls in relational databases but not exactly. For instance an empty value always equals to another empty value and equals to empty string. | ||
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| ==== Sort order ==== | ==== Sort order ==== | ||
| - | Since in EasyMorph a column can contain values of different types, sorting is also applicable to mixed columns. In case of mixed types ascending sort order is as follows: | + | Since in EasyMorph a column can contain values of different types, sorting is also applicable to mixed columns. In case of mixed types the ascending sort order is as follows: |
| * Empty cells and errors | * Empty cells and errors | ||
| * Booleans | * Booleans | ||
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| * Numbers | * Numbers | ||
| - | Which means that empty cells and errors are less than anything else, booleans are less than text and numbers, text is less than numbers, numbers are greater than anything else. | + | Which means that empty cells and errors are less than anything else, booleans are less than text and numbers, text is less than numbers, numbers are greater than any other data type. |
syntax/types.txt · Last modified: 2021/05/12 07:33 by dmitry