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Update date-time-functions.md

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docs/en/sql-reference/functions/date-time-functions.md
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@ -693,14 +693,14 @@ SELECT FROM_UNIXTIME(1234334543, '%Y-%m-%d %R:%S') AS DateTime
└─────────────────────┘
```
## toMJD {#tomjd}
## toModifiedJulianDay {#tomodifiedjulianday}
Converts a [Proleptic Gregorian calendar](https://en.wikipedia.org/wiki/Proleptic_Gregorian_calendar) date in text form `YYYY-MM-DD` to a [Modified Julian Day](https://en.wikipedia.org/wiki/Julian_day#Variants) number in Int32. This function supports date from `0000-01-01` to `9999-12-31`. It raises an exception if the argument cannot be parsed as a date, or the date is invalid.
**Syntax**
``` sql
toMJD(date)
toModifiedJulianDay(date)
```
**Parameters**
@ -718,25 +718,25 @@ Type: [Int32](../../sql-reference/data-types/int-uint.md).
Query:
``` sql
SELECT toMJD('2020-01-01');
SELECT toModifiedJulianDay('2020-01-01');
```
Result:
``` text
┌─toMJD('2020-01-01')─┐
│ 58849 │
└─────────────────────┘
┌─toModifiedJulianDay('2020-01-01')─┐
│ 58849 │
└───────────────────────────────────┘
```
## toMJDOrNull {#tomjdornull}
## toModifiedJulianDayOrNull {#tomodifiedjuliandayornull}
Similar to [toMJD()](#tomjd), but instead of raising exceptions it returns `NULL`.
Similar to [toModifiedJulianDay()](#tomodifiedjulianday), but instead of raising exceptions it returns `NULL`.
**Syntax**
``` sql
toMJDOrNull(date)
toModifiedJulianDayOrNull(date)
```
**Parameters**
@ -754,25 +754,25 @@ Type: [Nullable(Int32)](../../sql-reference/data-types/int-uint.md).
Query:
``` sql
SELECT toMJDOrNull('2020-01-01');
SELECT toModifiedJulianDayOrNull('2020-01-01');
```
Result:
``` text
┌─toMJDOrNull('2020-01-01')─┐
│ 58849 │
└───────────────────────────┘
┌─toModifiedJulianDayOrNull('2020-01-01')─┐
│ 58849 │
└─────────────────────────────────────────┘
```
## fromMJD {#frommjd}
## fromModifiedJulianDay {#frommodifiedjulianday}
Converts a [Modified Julian Day](https://en.wikipedia.org/wiki/Julian_day#Variants) number to a [Proleptic Gregorian calendar](https://en.wikipedia.org/wiki/Proleptic_Gregorian_calendar) date in text form `YYYY-MM-DD`. This function supports day number from `-678941` to `2973119` (which represent 0000-01-01 and 9999-12-31 respectively). It raises an exception if the day number is outside of the supported range.
**Syntax**
``` sql
fromMJD(day)
fromModifiedJulianDay(day)
```
**Parameters**
@ -790,25 +790,25 @@ Type: [String](../../sql-reference/data-types/string.md)
Query:
``` sql
SELECT fromMJD(58849);
SELECT fromModifiedJulianDay(58849);
```
Result:
``` text
┌─fromMJD(58849)─┐
│ 2020-01-01 │
└────────────────┘
┌─fromModifiedJulianDay(58849)─┐
│ 2020-01-01 │
└──────────────────────────────┘
```
## fromMJDOrNull {#frommjdornull}
## fromModifiedJulianDayOrNull {#frommodifiedjuliandayornull}
Similar to [fromMJD()](#frommjd), but instead of raising exceptions it returns `NULL`.
Similar to [fromModifiedJulianDayOrNull()](#frommodifiedjuliandayornull), but instead of raising exceptions it returns `NULL`.
**Syntax**
``` sql
fromMJDOrNull(day)
fromModifiedJulianDayOrNull(day)
```
**Parameters**
@ -826,13 +826,13 @@ Type: [Nullable(String)](../../sql-reference/data-types/string.md)
Query:
``` sql
SELECT fromMJDOrNull(58849);
SELECT fromModifiedJulianDayOrNull(58849);
```
Result:
``` text
┌─fromMJDOrNull(58849)─┐
│ 2020-01-01 │
└──────────────────────┘
┌─fromModifiedJulianDayOrNull(58849)─┐
│ 2020-01-01 │
└────────────────────────────────────┘
```