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Document SQL Server function mappings
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entity-framework/core/providers/sql-server/functions.md
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| --- | ||
| title: Function Mappings - Microsoft SQL Server Database Provider - EF Core | ||
| description: Function Mappings of the Microsoft SQL Server database provider | ||
| author: bricelam | ||
| ms.date: 10/07/2020 | ||
| uid: core/providers/sql-server/functions | ||
| --- | ||
| # Function Mappings of the Microsoft SQL Server Provider | ||
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| This page shows which .NET members are translated into which SQL functions when using the SQL Server provider. | ||
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| ## Binary functions | ||
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| .NET | SQL | Added in | ||
| ---------------------------- | ----------------------------- | -------- | ||
| bytes.Contains(value) | CHARINDEX(@value, @bytes) > 0 | EF Core 5.0 | ||
| bytes.Length | DATALENGTH(@bytes) | EF Core 5.0 | ||
| bytes.SequenceEqual(second) | @bytes = @second | EF Core 5.0 | ||
| EF.Functions.DataLength(arg) | DATALENGTH(@arg) | EF Core 5.0 | ||
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| ## Conversion functions | ||
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| .NET | SQL | Added in | ||
| ------------------------- | -------------------------------------- | -------- | ||
| bytes.ToString() | CONVERT(VARCHAR(100), @bytes) | ||
| byteValue.ToString() | CONVERT(VARCHAR(3), @byteValue) | ||
| charValue.ToString() | CONVERT(VARCHAR(1), @charValue) | ||
| Convert.ToBoolean(value) | CONVERT(bit, @value) | EF Core 5.0 | ||
| Convert.ToByte(value) | CONVERT(tinyint, @value) | ||
| Convert.ToDecimal(value) | CONVERT(decimal(18, 2), @value) | ||
| Convert.ToDouble(value) | CONVERT(float, @value) | ||
| Convert.ToInt16(value) | CONVERT(smallint, @value) | ||
| Convert.ToInt32(value) | CONVERT(int, @value) | ||
| Convert.ToInt64(value) | CONVERT(bigint, @value) | ||
| Convert.ToString(value) | CONVERT(nvarchar(max), @value) | ||
| dateTime.ToString() | CONVERT(VARCHAR(100), @dateTime) | ||
| dateTimeOffset.ToString() | CONVERT(VARCHAR(100), @dateTimeOffset) | ||
| decimalValue.ToString() | CONVERT(VARCHAR(100), @decimalValue) | ||
| doubleValue.ToString() | CONVERT(VARCHAR(100), @doubleValue) | ||
| floatValue.ToString() | CONVERT(VARCHAR(100), @floatValue) | ||
| guid.ToString() | CONVERT(VARCHAR(36), @guid) | ||
| intValue.ToString() | CONVERT(VARCHAR(11), @intValue) | ||
| longValue.ToString() | CONVERT(VARCHAR(20), @longValue) | ||
| sbyteValue.ToString() | CONVERT(VARCHAR(4), @sbyteValue) | ||
| shortValue.ToString() | CONVERT(VARCHAR(6), @shortValue) | ||
| timeSpan.ToString() | CONVERT(VARCHAR(100), @timeSpan) | ||
| uintValue.ToString() | CONVERT(VARCHAR(10), @uintValue) | ||
| ulongValue.ToString() | CONVERT(VARCHAR(19), @ulongValue) | ||
| ushortValue.ToString() | CONVERT(VARCHAR(5), @ushortValue) | ||
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| ## Date and time functions | ||
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| .NET | SQL | Added in | ||
| ----------------------------------------------------------- | ---------------------------------------------------- | -------- | ||
| DateTime.Now | GETDATE() | ||
| DateTime.Today | CONVERT(date, GETDATE()) | ||
| DateTime.UtcNow | GETUTCDATE() | ||
| dateTime.AddDays(value) | DATEADD(day, @value, @dateTime) | ||
| dateTime.AddHours(value) | DATEADD(hour, @value, @dateTime) | ||
| dateTime.AddMilliseconds(value) | DATEADD(millisecond, @value, @dateTime) | ||
| dateTime.AddMinutes(value) | DATEADD(minute, @value, @dateTime) | ||
| dateTime.AddMonths(months) | DATEADD(month, @months, @dateTime) | ||
| dateTime.AddSeconds(value) | DATEADD(second, @value, @dateTime) | ||
| dateTime.AddYears(value) | DATEADD(year, @value, @dateTime) | ||
| dateTime.Date | CONVERT(date, @dateTime) | ||
| dateTime.Day | DATEPART(day, @dateTime) | ||
| dateTime.DayOfYear | DATEPART(dayofyear, @dateTime) | ||
| dateTime.Hour | DATEPART(hour, @dateTime) | ||
| dateTime.Millisecond | DATEPART(millisecond, @dateTime) | ||
| dateTime.Minute | DATEPART(minute, @dateTime) | ||
| dateTime.Month | DATEPART(month, @dateTime) | ||
| dateTime.Second | DATEPART(second, @dateTime) | ||
| dateTime.TimeOfDay | CAST(@dateTime AS time) | EF Core 2.2 | ||
| dateTime.Year | DATEPART(year, @dateTime) | ||
| DateTimeOffset.Now | SYSDATETIMEOFFSET() | ||
| DateTimeOffset.UtcNow | SYSUTCDATETIME() | ||
| dateTimeOffset.AddDays(days) | DATEADD(day, @days, @dateTimeOffset) | ||
| dateTimeOffset.AddHours(hours) | DATEADD(hour, @hours, @dateTimeOffset) | ||
| dateTimeOffset.AddMilliseconds(milliseconds) | DATEADD(millisecond, @milliseconds, @dateTimeOffset) | ||
| dateTimeOffset.AddMinutes(minutes) | DATEADD(minute, @minutes, @dateTimeOffset) | ||
| dateTimeOffset.AddMonths(months) | DATEADD(month, @months, @dateTimeOffset) | ||
| dateTimeOffset.AddSeconds(seconds) | DATEADD(second, @seconds, @dateTimeOffset) | ||
| dateTimeOffset.AddYears(years) | DATEADD(year, @years, @dateTimeOffset) | ||
| dateTimeOffset.Date | CONVERT(date, @dateTimeOffset) | ||
| dateTimeOffset.Day | DATEPART(day, @dateTimeOffset) | ||
| dateTimeOffset.DayOfYear | DATEPART(dayofyear, @dateTimeOffset) | ||
| dateTimeOffset.Hour | DATEPART(hour, @dateTimeOffset) | ||
| dateTimeOffset.Millisecond | DATEPART(millisecond, @dateTimeOffset) | ||
| dateTimeOffset.Minute | DATEPART(minute, @dateTimeOffset) | ||
| dateTimeOffset.Month | DATEPART(month, @dateTimeOffset) | ||
| dateTimeOffset.Second | DATEPART(second, @dateTimeOffset) | ||
| dateTimeOffset.TimeOfDay | CAST(@dateTimeOffset AS time) | EF Core 2.2 | ||
| dateTimeOffset.Year | DATEPART(year, @dateTimeOffset) | ||
| EF.Functions.DateDiffDay(start, end) | DATEDIFF(DAY, @start, @end) | ||
| EF.Functions.DateDiffHour(start, end) | DATEDIFF(HOUR, @start, @end) | ||
| EF.Functions.DateDiffMicrosecond(start, end) | DATEDIFF(MICROSECOND, @start, @end) | ||
| EF.Functions.DateDiffMillisecond(start, end) | DATEDIFF(MILLISECOND, @start, @end) | ||
| EF.Functions.DateDiffMinute(start, end) | DATEDIFF(MINUTE, @start, @d2) | ||
| EF.Functions.DateDiffMonth(start, end) | DATEDIFF(MONTH, @start, @end) | ||
| EF.Functions.DateDiffNanosecond(start, end) | DATEDIFF(NANOSECOND, @start, @end) | ||
| EF.Functions.DateDiffSecond(start, end) | DATEDIFF(SECOND, @start, @end) | ||
| EF.Functions.DateDiffWeek(start, end) | DATEDIFF(WEEK, @start, @end) | EF Core 5.0 | ||
| EF.Functions.DateDiffYear(start, end) | DATEDIFF(YEAR, @start, @end) | ||
| EF.Functions.DateFromParts(year, month, day) | DATEFROMPARTS(@year, @month, @day) | EF Core 5.0 | ||
| EF.Functions.DateTime2FromParts(year, month, day, ...) | DATETIME2FROMPARTS(@year, @month, @day, ...) | EF Core 5.0 | ||
| EF.Functions.DateTimeFromParts(year, month, day, ...) | DATETIMEFROMPARTS(@year, @month, @day, ...) | EF Core 5.0 | ||
| EF.Functions.DateTimeOffsetFromParts(year, month, day, ...) | DATETIMEOFFSETFROMPARTS(@year, @month, @day, ...) | EF Core 5.0 | ||
| EF.Functions.IsDate(expression) | ISDATE(@expression) | EF Core 3.0 | ||
| EF.Functions.SmallDateTimeFromParts(year, month, day, ...) | SMALLDATETIMEFROMPARTS(@year, @month, @day, ...) | EF Core 5.0 | ||
| EF.Functions.TimeFromParts(hour, minute, second, ...) | TIMEFROMPARTS(@hour, @minute, @second, ...) | EF Core 5.0 | ||
| timeSpan.Hours | DATEPART(hour, @timeSpan) | EF Core 5.0 | ||
| timeSpan.Milliseconds | DATEPART(millisecond, @timeSpan) | EF Core 5.0 | ||
| timeSpan.Minutes | DATEPART(minute, @timeSpan) | EF Core 5.0 | ||
| timeSpan.Seconds | DATEPART(second, @timeSpan) | EF Core 5.0 | ||
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| ## Numeric functions | ||
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| .NET | SQL | ||
| ----------------------- | --- | ||
| Math.Abs(value) | ABS(@value) | ||
| Math.Acos(d) | ACOS(@d) | ||
| Math.Asin(d) | ASIN(@d) | ||
| Math.Atan(d) | ATAN(@d) | ||
| Math.Atan2(y, x) | ATN2(@y, @x) | ||
| Math.Ceiling(d) | CEILING(@d) | ||
| Math.Cos(d) | COS(@d) | ||
| Math.Exp(d) | EXP(@d) | ||
| Math.Floor(d) | FLOOR(@d) | ||
| Math.Log(d) | LOG(@d) | ||
| Math.Log(a, newBase) | LOG(@a, @newBase) | ||
| Math.Log10(d) | LOG10(@d) | ||
| Math.Pow(x, y) | POWER(@x, @y) | ||
| Math.Round(d) | ROUND(@d, 0) | ||
| Math.Round(d, decimals) | ROUND(@d, @decimals) | ||
| Math.Sign(value) | SIGN(@value) | ||
| Math.Sin(a) | SIN(@a) | ||
| Math.Sqrt(d) | SQRT(@d) | ||
| Math.Tan(a) | TAN(@a) | ||
| Math.Truncate(d) | ROUND(@d, 0, 1) | ||
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| ## String functions | ||
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| .NET | SQL | Added in | ||
| ----------------------------------------------------------------------- | ---------------------------------------------------------------------- | -------- | ||
| EF.Functions.Collate(operand, collation) | @operand COLLATE @collation | EF Core 5.0 | ||
| EF.Functions.Contains(propertyReference, searchCondition) | CONTAINS(@propertyReference, @searchCondition) | EF Core 2.2 | ||
| EF.Functions.Contains(propertyReference, searchCondition, languageTerm) | CONTAINS(@propertyReference, @searchCondition, LANGUAGE @languageTerm) | EF Core 2.2 | ||
| EF.Functions.FreeText(propertyReference, freeText) | FREETEXT(@propertyReference, @freeText) | ||
| EF.Functions.FreeText(propertyReference, freeText, languageTerm) | FREETEXT(@propertyReference, @freeText, LANGUAGE @languageTerm) | ||
| EF.Functions.Like(matchExpression, pattern) | @matchExpression LIKE @pattern | ||
| EF.Functions.Like(matchExpression, pattern, escapeCharacter) | @matchExpression LIKE @pattern ESCAPE @escapeCharacter | ||
| string.Compare(strA, strB) | CASE WHEN @strA = @strB THEN 0 ... END | ||
| string.Concat(str0, str1) | @str0 + @str1 | ||
| string.IsNullOrEmpty(value) | @value IS NULL OR @value = N'' | ||
| string.IsNullOrWhiteSpace(value) | @value IS NULL OR LTRIM(RTRIM(@value)) = N'' | ||
| stringValue.CompareTo(strB) | CASE WHEN @stringValue = @strB THEN 0 ... END | ||
| stringValue.Contains(value) | @stringValue LIKE N'%' + @value + N'%' | ||
| stringValue.EndsWith(value) | @stringValue LIKE N'%' + @value | ||
| stringValue.FirstOrDefault() | SUBSTRING(@stringValue, 1, 1) | EF Core 5.0 | ||
| stringValue.IndexOf(value) | CHARINDEX(@value, @stringValue) - 1 | ||
| stringValue.LastOrDefault() | SUBSTRING(@stringValue, LEN(@stringValue), 1) | EF Core 5.0 | ||
| stringValue.Length | LEN(@stringValue) | ||
| stringValue.Replace(@oldValue, @newValue) | REPLACE(@stringValue, @oldValue, @newValue) | ||
| stringValue.StartsWith(value) | @stringValue LIKE @value + N'%' | ||
| stringValue.Substring(startIndex, length) | SUBSTRING(@stringValue, @startIndex + 1, @length) | ||
| stringValue.ToLower() | LOWER(@stringValue) | ||
| stringValue.ToUpper() | UPPER(@stringValue) | ||
| stringValue.Trim() | LTRIM(RTRIM(@stringValue)) | ||
| stringValue.TrimEnd() | RTRIM(@stringValue) | ||
| stringValue.TrimStart() | LTRIM(@stringValue) | ||
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| ## Miscellaneous functions | ||
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| .NET | SQL | Added in | ||
| ---------------------------------------- | ---------------------------------- | -------- | ||
| collection.Contains(item) | @item IN @collection | EF Core 3.0 | ||
| enumValue.HasFlag(flag) | @enumValue & @flag = @flag | ||
| Guid.NewGuid() | NEWID() | ||
| nullable.GetValueOrDefault() | COALESCE(@nullable, 0) | ||
| nullable.GetValueOrDefault(defaultValue) | COALESCE(@nullable, @defaultValue) | ||
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| > [!NOTE] | ||
| > Some SQL has been simplified for illustration purposes. The actual SQL is more complex to handle a wider range of values. | ||
| ## See also | ||
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| * [Spatial Function Mappings](xref:core/providers/sql-server/spatial#spatial-function-mappings) |
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