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Questa pagina mostra quali membri .NET vengono convertiti in quali funzioni SQL quando si usa il provider SQL Server.
Funzioni di aggregazione
| .NET | SQL | Aggiunta in |
|---|---|---|
| EF. Functions.StandardDeviationSample(group. Select(x => x.Property)) | STDEV(Property) | |
| EF.Functions.StandardDeviationPopulation(group.Select(x => x.Property)) | STDEVP(Property) | |
| EF. Functions.VarianceSample(group. Select(x => x.Property)) | VAR(Proprietà) | |
| EF.Functions.VariancePopulation(group.Select(x => x.Property)) | VARP(Proprietà) | |
| gruppo. Average(x => x.Property) | AVG(Property) | |
| gruppo. Count() | COUNT(*) | |
| gruppo.LongCount() | COUNT_BIG(*) | |
| gruppo.Max(x => x.Property) | MAX(Property) | |
| gruppo.Min(x => x.Proprietà) | MIN(Property) | |
| gruppo.Somma(x => x.Property) | SOMMA(Property) | |
| string.Concat(group.Select(x => x.Property)) | STRING_AGG(Property, N'') | |
| string.Join(separatore, gruppo.Select(x => x.Property)) | STRING_AGG(Property, @separator) |
Funzioni binarie
| .NET | SQL | Aggiunta in |
|---|---|---|
| Byte. Contains(value) | CHARINDEX(@value, @bytes)> 0 | |
| bytes.ElementAt(i) | SUBSTRING(@bytes, @i + 1, 1) | |
| bytes.First() | SUBSTRING(@bytes, 1, 1) | |
| Byte. Lunghezza | DATALENGTH(@bytes) | |
| bytes.SequenceEqual(second) | @bytes = @second | |
| byte[i] | SUBSTRING(@bytes, @i + 1, 1) | |
| EF.Functions.DataLength(arg) | DATALENGTH(@arg) |
Funzioni di conversione
| .NET | SQL | Aggiunta in |
|---|---|---|
| bytes.ToString() | CONVERT(varchar(100), @bytes) | |
| byteValue.ToString() | CONVERT(varchar(3), @byteValue) | |
| charValue.ToString() | CONVERT(varchar(1), @charValue) | |
| Convert.ToBoolean(valore) | CONVERT(bit, @value) | |
| 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) | |
| dateOnly.ToString() | CONVERT(varchar(100), @dateOnly) | |
| 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) | |
| timeOnly.ToString() | CONVERT(varchar(100), @timeOnly) | |
| timeSpan.ToString() | CONVERT(varchar(100), @timeSpan) | |
| uintValue.ToString() | CONVERT(varchar(10), @uintValue) | |
| ulongValue.ToString() | CONVERT(varchar(19), @ulongValue) | |
| ushortValue.ToString() | CONVERT(varchar(5), @ushortValue) |
Funzioni di data e ora
| .NET | SQL | Aggiunta in |
|---|---|---|
| DateTime.Now | GETDATE() | |
| DateTime.Today | CONVERT(date, GETDATE()) | |
| DateTime.UtcNow | GETUTCDATE() | |
| dateTime.AddDays(value) | DATEADD(giorno, @value, @dateTime) | |
| dateTime.AddHours(value) | DATEADD(ora, @value, @dateTime)) | |
| dateTime.AddMilliseconds(value) | DATEADD(millisecondo, @value, @dateTime) | |
| dateTime.AddMinutes(value) | DATEADD(minuto, @value, @dateTime)) | |
| dataOra.AggiungiMesi(mesi) | DATEADD(mese, @months, @dateTime) | |
| dateTime.AddSeconds(value) | DATEADD(secondo, @value, @dateTime)) | |
| dateTime.AddYears(value) | DATEADD(year, @value, @dateTime)) | |
| dateTime.Date (Funzione per ottenere la data) | CONVERT(date, @dateTime) | |
| dateTime.Giorno | DATEPART(day, @dateTime) | |
| dateTime.DayOfYear (Giorno dell'anno) | DATEPART(dayofyear, @dateTime) | |
| dateTime.Hour | DATEPART(hour, @dateTime) | |
| dateTime.Microsecond | DATEPART(microsecondo, @dateTime) % 1000 | EF Core 10.0 |
| dateTime.Millisecond | DATEPART(millisecondi, @dateTime) | |
| dateTime.Minute | DATEPART(minuto, @dateTime) | |
| dateTime.Month | DATEPART(month, @dateTime) | |
| dateTime.Nanosecond | DATEPART(nanosecondo, @dateTime) % 1000 | EF Core 10.0 |
| dateTime.Second | DATEPART(secondo, @dateTime) | |
| dateTime.TimeOfDay | CONVERT(time, @dateTime) | |
| dateTime.Year | DATEPART(anno, @dateTime) | |
| DateTimeOffset.Now | SYSDATETIMEOFFSET() | |
| DateTimeOffset.UtcNow | SYSUTCDATETIME() | |
| dateTimeOffset.AddDays(days) | DATEADD(giorno, @days, @dateTimeOffset) | |
| dateTimeOffset.AddHours(hours) | DATEADD(ora, @hours, @dateTimeOffset)) | |
| dateTimeOffset.AddMilliseconds(milliseconds) - Questo metodo aggiunge un numero specificato di millisecondi all'oggetto dateTimeOffset. | DATEADD(millisecondo, @milliseconds, @dateTimeOffset) | |
| dateTimeOffset.AddMinutes(minutes) | DATEADD(minuto, @minutes, @dateTimeOffset)) | |
| dateTimeOffset.AddMonths(months) | DATEADD(mese, @months, @dateTimeOffset)) | |
| dateTimeOffset.AddSeconds(aggiungiSecondi) | DATEADD(secondo, @seconds, @dateTimeOffset)) | |
| dateTimeOffset.AddYears(years) | DATEADD(year, @years, @dateTimeOffset)) | |
| dateTimeOffset.Date | CONVERT(date, @dateTimeOffset) | |
| dateTimeOffset.Day | DATEPART(day, @dateTimeOffset) | |
| dateTimeOffset.DayOfYear // Giorno dell'anno | DATEPART(dayofyear, @dateTimeOffset) | |
| dateTimeOffset.Hour | DATEPART(hour, @dateTimeOffset) | |
| dateTimeOffset.Microsecond | DATEPART(microsecondo, @dateTimeOffset) % 1000 | EF Core 10.0 |
| dateTimeOffset.Millisecond | DATEPART(millisecondi, @dateTimeOffset) | |
| dateTimeOffset.Minute | DATEPART(minuto, @dateTimeOffset) | |
| dateTimeOffset.Month | DATEPART(month, @dateTimeOffset) | |
| dateTimeOffset.Nanosecond | DATEPART(nanosecondo, @dateTimeOffset) % 1000 | EF Core 10.0 |
| dateTimeOffset.Second | DATEPART(secondo, @dateTimeOffset) | |
| dateTimeOffset.TimeOfDay | CONVERT(time, @dateTimeOffset) | |
| dateTimeOffset.ToUnixTimeSeconds() | DATEDIFF_BIG(second, '1970-01-01T00:00:00.0000000+00:00', @dateTimeOffset) | |
| dateTimeOffset.ToUnixTimeMilliseconds() | DATEDIFF_BIG(millesimo di secondo, '1970-01-01T00:00:00.0000000+00:00', @dateTimeOffset) | |
| dateTimeOffset.Year | DATEPART(anno, @dateTimeOffset) | |
| DateOnly.FromDateTime(dateTime) | CONVERT(date, @dateTime) | |
| dateOnly.AddDays(value) | DATEADD(giorno, @value, @dateOnly) | |
| dateOnly.AggiungiMesi(months) | DATEADD(mese, @months, @dateOnly) | |
| dateOnly.AddYears(value) | DATEADD(year, @value, @dateOnly)) | |
| dateOnly.Giorno | DATEPART(day, @dateOnly) | |
| dateOnly.GiornoDellAnno | DATEPART(dayofyear, @dateOnly) | |
| dateOnly.Month | DATEPART(month, @dateOnly) | |
| dateOnly.Anno | DATEPART(anno, @dateOnly) | |
| dateOnly.DayNumber | DATEDIFF(giorno, '0001-01-01', @dateOnly) | EF Core 10.0 |
| EF. Functions.AtTimeZone(dateTime, timeZone) | @dateTime FUSO ORARIO @timeZone | |
| EF.Functions.DateDiffDay(start, end) | DATEDIFF(giorno, @start, @end) | |
| EF.Functions.DateDiffHour(start, end) | DATEDIFF(ora, @start, @end) | |
| EF.Functions.DateDiffMicrosecond(start, end) | DATEDIFF(microsecondi, @start, @end) | |
| EF.Functions.DateDiffMillisecond(start, end) | DATEDIFF(millisecondo, @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(nanosecondo, @start, @end) | |
| EF.Functions.DateDiffSecond(start, end) | DATEDIFF(secondo, @start, @end) | |
| EF.Functions.DateDiffWeek(start, end) | DATEDIFF(week, @start, @end)) | |
| EF.Functions.DateDiffYear(start, end) | DATEDIFF(anno, @start, @end) | |
| EF.Functions.DateFromParts(year, month, day) | DATEFROMPARTS(@year, @month, @day) | |
| EF.Functions.DateTime2FromParts(year, month, day, ...) | DATETIME2FROMPARTS(@year, @month, @day, ...) | |
| EF.Functions.DataOraDaParti(anno, mese, giorno, ...) | DATETIMEFROMPARTS(@year, @month, @day, ...) | |
| EF.Functions.DateTimeOffsetFromParts(year, month, day, ...) | DATETIMEOFFSETFROMPARTS(@year, @month, @day, ...) | |
| EF. Functions.IsDate(expression) | ISDATE(@expression) | |
| EF.Functions.SmallDateTimeFromParts(year, month, day, ...) | SMALLDATETIMEFROMPARTS(@year, @month, @day, ...) | |
| EF.Funzioni.TimeFromParts(hour, minute, second, ...) | TIMEFROMPARTS(@hour, @minute, @second, ...) | |
| timeOnly.AddHours(value) | DATEADD(ora, @value, @timeOnly)) | |
| timeOnly.AddMinutes(value) | DATEADD(minuto, @value, @timeOnly)) | |
| timeOnly.Hour | DATEPART(hour, @timeOnly) | |
| timeOnly.IsBetween(start, end) | @timeOnly >= @start AND @timeOnly<@end | |
| timeOnly.Microsecond | DATEPART(microsecondo, @timeOnly) % 1000 | EF Core 10.0 |
| timeOnly.Millisecond | DATEPART(millisecondi, @timeOnly) | |
| timeOnly.Minute | DATEPART(minute, @timeOnly) | |
| timeOnly.Nanosecond | DATEPART(nanosecondo, @timeOnly) % 1000 | EF Core 10.0 |
| timeOnly.Second | DATEPART(second, @timeOnly) | |
| timeSpan.Hours | DATEPART(hour, @timeSpan) | |
| intervalloDiTempo.Microsecondo | DATEPART(microsecondo, @timeSpan) % 1000 | EF Core 10.0 |
| timeSpan.Milliseconds | DATEPART(millisecondi, @timeSpan) | |
| timeSpan.Minutes | DATEPART(minuto, @timeSpan) | |
| timeSpan.Nanosecond | DATEPART(nanosecondo, @timeSpan) % 1000 | EF Core 10.0 |
| timeSpan.Seconds | DATEPART(secondo, @timeSpan) |
Funzioni numeriche
| .NET | SQL | Aggiunta in |
|---|---|---|
| double.DegreesToRadians(x) | RADIANS (@x) | |
| double.RadiansToDegrees(x) | DEGREES (@x) | |
| EF.Functions.Random() | RAND() | |
| Math.Abs(valore) | ABS(@valore) | |
| 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.Max(x, y) | GREATEST(@x, @y) | EF Core 9.0 |
| Math.Min(x, y) | LEAST(@x, @y) | EF Core 9.0 |
| Math.Pow(x, y) | POWER(@x, @y) | |
| Math.Round(d) | ROUND(@d, 0) | |
| Math.Round(d, decimals) | ROUND(@d, @decimals) | |
| Math.Sign(valore) | SIGN(@valore) | |
| Math.Sin(a) | SIN(@a) | |
| Math.Sqrt(d) | SQRT(@d) | |
| Math.Tan(a) | TAN(@a) | |
| Math.Truncate(d) | ROUND(@d, 0, 1) |
Suggerimento
Oltre ai metodi elencati qui, vengono tradotte anche le implementazioni matematiche generiche corrispondenti e i metodi MathF. Ad esempio, Math.Sin, MathF.Sin, double.Sin, e float.Sin tutti eseguono il mapping alla funzione SIN in SQL.
Funzioni di stringa
| .NET | SQL | Aggiunta in |
|---|---|---|
| EF.Functions.Collate(operando, regole di confronto) | @operand COLLATE @collation | |
| EF.Functions.Contains(propertyReference, searchCondition) | CONTAINS(@propertyReference, @searchCondition) | |
| EF.Functions.Contains(propertyReference, searchCondition, languageTerm) | CONTAINS(@propertyReference, @searchCondition, LANGUAGE @languageTerm) | |
| EF.Functions.FreeText(propertyReference, freeText) | FREETEXT(@propertyReference, @freeText) | |
| EF.Functions.FreeText(propertyReference, freeText, languageTerm) | FREETEXT(@propertyReference, @freeText, LANGUAGE @languageTerm) | |
| EF.Functions.IsNumeric(expression) | ISNUMERIC(@expression) | |
| EF.Functions.Like(matchExpression, pattern) | @matchExpression COME @pattern | |
| EF.Functions.Like(matchExpression, pattern, escapeCharacter) | @matchExpression LIKE @pattern ESCAPE @escapeCharacter | |
| stringa.Compare(strA, strB) | CASO QUANDO @strA = @strB POI 0 ... FINE | |
| stringa.Concat(str0, str1) | @str0 + @str1 | |
| string.IsNullOrEmpty(value) | @value È NULL O @value COME N'' | |
| string.IsNullOrWhiteSpace(value) | @value È NULL O @value = N'' | |
| corda. Join(", ", new [] { x, y, z}) | CONCAT_WS(N', ', @x, @y, @z) | EF Core 9.0 |
| stringValue.CompareTo(strB) | CASO QUANDO @stringValue = @strB POI 0 ... FINE | |
| stringValue.Contains(valore) | @stringValue LIKE N'%' + @value + N'%' | |
| stringValue.EndsWith(valore) | @stringValue LIKE N'%' + @value | |
| stringValue.FirstOrDefault() | SUBSTRING(@stringValue, 1, 1) | |
| stringValue.IndexOf(value) | CHARINDEX(@value, @stringValue) - 1 | |
| stringValue.IndexOf(value, startIndex) | CHARINDEX(@value, @stringValue, @startIndex) - 1 | |
| stringValue.LastOrDefault() | SUBSTRING(@stringValue, LEN(@stringValue), 1) | |
| stringValue.Length | LEN(@stringValue) | |
| stringValue.Replace(@oldValue, @newValue) | REPLACE(@stringValue, @oldValue, @newValue) | |
| stringValue.StartsWith(value) | @stringValue LIKE @value + N'%' | |
| stringValue.Substring(startIndex) | SUBSTRING(@stringValue, @startIndex + 1, LEN(@stringValue)) | |
| 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) |
Funzioni varie
| .NET | SQL | Aggiunta in |
|---|---|---|
| enumValue.HasFlag(flag) | @enumValue & @flag = @flag | |
| Guid.NewGuid() | NEWID() | |
| nullable.GetValueOrDefault() | COALESCE(@nullable, 0) | |
| Nullable.GetValueOrDefault(defaultValue) | COALESCE(@nullable, @defaultValue) |
Nota
Alcune traduzioni SQL sono state semplificate a scopo illustrativo. L'effettivo SQL è più complesso per gestire un intervallo più ampio di valori.
Vedi anche
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