原代码来自：东莞--小小大神
使用
--聚合函数 SELECT father_key,dbo.String_Agg(department_name) FROM dbo.b_department GROUP BY father_key --首字母大写 SELECT dbo.[Capit](null),dbo.capit('我是 xiaoxiao a') --计算表达式的值 SELECT dbo.Fn_Cacl('1+6*2*(1+1)') --日期时间格式化 SELECT dbo.FormatDateTime(GETDATE(),'yyyy年MM月dd日'), dbo.FormatDateTime(GETDATE(),'yyyy-MM-dd hh:mm:ss'), dbo.FormatDateTime(GETDATE(),'mm:ss'), dbo.FormatDateTime(GETDATE(),'yyyy/M/d'), dbo.FormatDateTime(GETDATE(),'dd/MM/yyyy') --四舍六入五成双 SELECT dbo.MyRound(5.25,1),dbo.MyRound(5.35,1) --字符串处理 SELECT dbo.TrimAll('0124我是在测试789','0123456789'), dbo.PadLeft('我',10,'0'),dbo.PadRight('我',10,'0'), dbo.TrimEnd('0124我是在测试789','0123456789'),dbo.TrimStart('0124我是在测试789','0123456789') ,dbo.ToSBC('wo'),dbo.ToDBC('ｗｏ'),dbo.charat('1,2,3,4,5',',',0),dbo.MyTrim(' 000 ') --字符串拆分 SELECT * FROM dbo.String_Split('1,2,3,4',',') --连续数字 SELECT * FROM dbo.Ft_GetNumbers(11) --正则表达式匹配替换 SELECT dbo.Reg_Match('我是12的','d'),dbo.Reg_CharIndex('我是12的','d'),dbo.Reg_Replace('我是12的','d','') --正则表达式拆分 SELECT * FROM dbo.Reg_Split('1A 2B 3C 4D 5E 6F的 7G 8H 9I 10J 11Q 12J 13K 14L 15M 16N ffee80 #800080','d+[A-Z] ') --取第i个逗号分割的字符串 SELECT dbo.CharAt('1,2,3,4,5,6',',',2)
定义，这里是已经编译好的DLL
ALTER DATABASE master SET TRUSTWORTHY ON go CREATE ASSEMBLY [Database2] FROM 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WITH PERMISSION_SET = UNSAFE GO /* --报错 消息 10327，级别 14，状态 1，第 1 行 针对程序集 'Database2' 的 CREATE ASSEMBLY 失败，因为程序集 'Database2' 未获授权， 不满足 PERMISSION_SET = UNSAFE。满足以下两个条件之一时将给程序集授权: 数据库所有者(DBO)拥有 UNSAFE ASSEMBLY 权限，且数据库具有 TRUSTWORTHY 数据库属性； 或者，程序集已使用其对应登录名具有 UNSAFE ASSEMBLY 权限的证书或非对称密钥加以签名。 --解决 ALTER DATABASE master SET TRUSTWORTHY ON go */ exec sp_configure 'show advanced options',1 reconfigure exec sp_configure 'clr enabled',1 reconfigure exec sp_configure 'show advanced options',0 RECONFIGURE go /* DROP AGGREGATE String_Agg DROP FUNCTION Capit DROP FUNCTION Fn_Cacl DROP FUNCTION FormatDateTime DROP FUNCTION MyRound DROP FUNCTION MyTrim DROP FUNCTION PadLeft DROP FUNCTION PadRight DROP FUNCTION Reg_CharIndex DROP FUNCTION Reg_Match DROP FUNCTION Reg_Replace DROP FUNCTION ToDBC DROP FUNCTION ToSBC DROP FUNCTION TrimAll DROP FUNCTION TrimEnd DROP FUNCTION TrimStart DROP FUNCTION Ft_GetNumbers DROP FUNCTION Reg_Split DROP FUNCTION String_Split DROP PROCEDURE BulkCopyToXls DROP PROCEDURE sp_getman DROP PROCEDURE sp_postman DROP PROCEDURE sp_ReadTxt DROP FUNCTION CharAt DROP FUNCTION ft_clearing DROP ASSEMBLY database2 */ --CLR CREATE AGGREGATE [dbo].[String_Agg](@value NVARCHAR (4000)) RETURNS NVARCHAR (4000) EXTERNAL NAME [Database2].[String_Agg] go CREATE FUNCTION [dbo].[Capit] (@input NVARCHAR (MAX)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[Capit] GO CREATE FUNCTION [dbo].[Fn_Cacl] (@exp NVARCHAR (1000)) RETURNS NVARCHAR (1000) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[Fn_Cacl] GO CREATE FUNCTION [dbo].[FormatDateTime] (@input DATETIME, @fmt NVARCHAR (200)) RETURNS NVARCHAR (200) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[FormatDateTime] GO CREATE FUNCTION [dbo].[MyRound] (@val FLOAT (53), @dec SMALLINT) RETURNS FLOAT (53) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[MyRound] GO CREATE FUNCTION [dbo].[MyTrim] (@input NVARCHAR (MAX)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[MyTrim] GO CREATE FUNCTION [dbo].[PadLeft] (@input NVARCHAR (MAX), @i INT, @c NVARCHAR (1000)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[PadLeft] GO CREATE FUNCTION [dbo].[PadRight] (@input NVARCHAR (MAX), @i INT, @c NVARCHAR (1000)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[PadRight] GO CREATE FUNCTION [dbo].[Reg_CharIndex] (@input NVARCHAR (MAX), @sp NVARCHAR (1000)) RETURNS INT AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[Reg_CharIndex] GO CREATE FUNCTION [dbo].[Reg_Match] (@input NVARCHAR (MAX), @sp NVARCHAR (1000)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[Reg_Match] GO CREATE FUNCTION [dbo].[Reg_Replace] (@input NVARCHAR (MAX), @sp NVARCHAR (1000), @x NVARCHAR (1000)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[Reg_Replace] Go /* CREATE FUNCTION [dbo].[ft_clearing] (@input NVARCHAR (MAX)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[ft_clearing] GO */ CREATE FUNCTION [dbo].[ToDBC] (@input NVARCHAR (MAX)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[ToDBC] GO CREATE FUNCTION [dbo].[ToSBC] (@input NVARCHAR (MAX)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[ToSBC] GO CREATE FUNCTION [dbo].[TrimAll] (@input NVARCHAR (MAX), @chars NVARCHAR (100)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[TrimAll] GO CREATE FUNCTION [dbo].[TrimEnd] (@input NVARCHAR (MAX), @chars NVARCHAR (100)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[TrimEnd] GO CREATE FUNCTION [dbo].[TrimStart] (@input NVARCHAR (MAX), @chars NVARCHAR (100)) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[TrimStart] GO CREATE FUNCTION [dbo].[Ft_GetNumbers] (@n INT) RETURNS TABLE ( [Val] INT NULL) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[Ft_GetNumbers] GO CREATE FUNCTION [dbo].[Reg_Split] (@input NVARCHAR (MAX), @sp NVARCHAR (1000)) RETURNS TABLE ( [id] INT, [Val] NVARCHAR (4000) NULL) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[Reg_Split] GO CREATE FUNCTION [dbo].[String_Split] (@input NVARCHAR (MAX), @sp NVARCHAR (1)) RETURNS TABLE ( [id] INT, [Val] NVARCHAR (4000) NULL) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[String_Split] GO CREATE PROCEDURE [dbo].[BulkCopyToXls] @sql NVARCHAR (4000), @savePath NVARCHAR (1000), @tableName NVARCHAR (200), @maxRecordCount INT AS EXTERNAL NAME [Database2].[myProcedure].[BulkCopyToXls] GO CREATE PROCEDURE [dbo].[sp_getman] @url NVARCHAR (1000), @result NVARCHAR (MAX) OUTPUT AS EXTERNAL NAME [Database2].[StoredProcedures].[sp_getman] GO CREATE PROCEDURE [dbo].[sp_postman] @url NVARCHAR (1000), @json NVARCHAR (4000), @result NVARCHAR (MAX) OUTPUT AS EXTERNAL NAME [Database2].[StoredProcedures].[sp_postman] GO CREATE PROCEDURE [dbo].[sp_ReadTxt] @file NVARCHAR (1000), @coding NVARCHAR (100) AS EXTERNAL NAME [Database2].[StoredProcedures].[sp_ReadTxt] GO CREATE FUNCTION [dbo].[CharAt] (@input NVARCHAR (MAX), @chars NVARCHAR (100),@i int) RETURNS NVARCHAR (MAX) AS EXTERNAL NAME [Database2].[UserDefinedFunctions].[CharAt]
C#源码
--1、 sql function 1 using System; using System.Data; using System.Data.SqlClient; using System.Data.SqlTypes; using Microsoft.SqlServer.Server; using System.Collections; using System.Text.RegularExpressions; using System.Globalization; using System.Threading; using System.Text; public partial class UserDefinedFunctions { /* 表值函数,生成N条记录,测试用,速度不错哦 */ struct Table { public int n; public Table(int n) { this.n = n; } } [SqlFunction(FillRowMethodName = "Fill", TableDefinition = "Val int")] public static IEnumerable Ft_GetNumbers(int n) { for (int i = 1; i <= n; i++) { yield return new Table(i); } } private static void Fill(object source, out int n) { Table pi = (Table)source; n = pi.n; } [SqlFunction] public static string PadLeft(string input, int i, string c) { if (input == null) return null; //字符补齐 if (string.IsNullOrEmpty(c)) return input.PadLeft(i, ' '); else return input.PadLeft(i, c.ToCharArray()[0]); } [SqlFunction] public static string PadRight(string input, int i, string c) { if (input == null) return null; //字符补齐 if (string.IsNullOrEmpty(c)) return input.PadRight(i, ' '); else return input.PadRight(i, c.ToCharArray()[0]); } [SqlFunction] public static string MyTrim(string input ) { if (input == null) return null; return input.Trim( ); } [SqlFunction] public static string TrimAll(string input,string chars) { if (input == null) return null; return input.Trim(chars.ToCharArray()); } [SqlFunction] public static string TrimStart(string input, string chars) { if (input == null) return null; return input.TrimStart(chars.ToCharArray()); } [SqlFunction] public static string TrimEnd(string input, string chars) { if (input == null) return null; return input.TrimEnd(chars.ToCharArray()); } [SqlFunction] public static string FormatDateTime(DateTime? input, string fmt ) { if (input==null) { return null; } return Convert.ToDateTime(input).ToString(fmt); } [SqlFunction] public static SqlString ToSBC(string input) { if (input == null) return null; //半角转全角： char[] c = input.ToCharArray(); for (int i = 0; i < c.Length; i++) { if (c[i] == 32) { c[i] = (char)12288; continue; } if (c[i] < 127) c[i] = (char)(c[i] + 65248); } return new string(c); } [SqlFunction] public static string ToDBC(string input) { if (input == null) return null; //全角转半角： char[] c = input.ToCharArray(); for (int i = 0; i < c.Length; i++) { if (c[i] == 12288) { c[i] = (char)32; continue; } if (c[i] > 65280 && c[i] < 65375) c[i] = (char)(c[i] - 65248); } return new string(c); } /* 表值函数,字符串拆分,这个有用 */ struct Table2 { public string s; public int i; public Table2(int i, string s) { this.i=i; this.s = s; } } private static void Fill2(object source,out int i, out string s) { Table2 T = (Table2)source; s = T.s; i = T.i; } /* 表值函数,字符提取,可以写正则表达式匹配和替换的函数,有用 */ [SqlFunction(FillRowMethodName = "Fill2", TableDefinition = "id int,Val nvarchar(4000)")] public static IEnumerable Reg_Split(string input, string sp) { if (input != null) { int i = 1; Match match = Regex.Match(input, sp); while (match.Success) { yield return new Table2(i++,match.Value); match = match.NextMatch(); } } } [SqlFunction(FillRowMethodName = "Fill2", TableDefinition = "Val nvarchar(4000)")] public static IEnumerable String_Split(string input, string sp) { if (input != null) { int i = 1; foreach (string s in input.Split(sp.ToCharArray()[0])) { yield return new Table2(i++,s); } } } [SqlFunction] public static string Reg_Match(string input, string sp) { if (input == null) return null; return Regex.IsMatch(input, sp).ToString(); } [SqlFunction] public static int Reg_CharIndex(string input, string sp) { if (input == null) return -1; Match match = Regex.Match(input, sp); if (match.Success) return match.Index + 1; return 0; } [SqlFunction] public static string CharAt(string input, string chars, int i) { if (input == null) return null; try { return input.Split(chars.ToCharArray()[0])[i]; } catch { return null; } } [SqlFunction] public static string Reg_Replace(string input, string sp, string x) { if (input == null) return null; Regex rx = new Regex(sp); return rx.Replace(input, x); } [SqlFunction] public static string ft_clearing(string input) { if (input == null) return ""; Regex rx = new Regex(@"s"); return rx.Replace(input, "").Trim(); } [SqlFunction] public static string Capit(string input) { if (input == null) return null; //首字母大写,很有用,速度非常好,神速 TextInfo tx = Thread.CurrentThread.CurrentCulture.TextInfo; return tx.ToTitleCase(input); } [Microsoft.SqlServer.Server.SqlFunction] public static SqlDouble MyRound(SqlDouble val, SqlInt16 dec) { return Math.Round( val.Value, dec.Value); } [SqlFunction(DataAccess = DataAccessKind.Read)] public static string Fn_Cacl(string exp) { string sql = string.Format("select {0}", exp); using (SqlConnection cn = new SqlConnection("context connection=true")) { cn.Open(); string select = Convert.ToString(sql); try { SqlCommand cmd = new SqlCommand(Convert.ToString(sql), cn); return cmd.ExecuteScalar().ToString(); } catch (Exception ex) { return null; } } } } -- 2、SqlAggregate1.cs using System; using System.Data; using Microsoft.SqlServer.Server; using System.Data.SqlTypes; using System.IO; using System.Text; [Serializable] [SqlUserDefinedAggregate(Format.UserDefined, IsInvariantToNulls = true, IsInvariantToDuplicates = false, IsInvariantToOrder = false, MaxByteSize = 8000)] public class String_Agg : IBinarySerialize { //字符串拼接,这个有用 private StringBuilder sb; public void Init() { this.sb = new StringBuilder(); } public void Accumulate(SqlString value) { if (value.IsNull) { return; } this.sb.Append(value.Value).Append(','); } public void Merge(String_Agg other) { this.sb.Append(other.sb); } public SqlString Terminate() { string output = string.Empty; if (this.sb != null && this.sb.Length > 0) { output = this.sb.ToString(0, this.sb.Length - 1); } return new SqlString(output); } public void Read(BinaryReader r) { sb = new StringBuilder(r.ReadString()); } public void Write(BinaryWriter w) { w.Write(this.sb.ToString()); } } --3、SqlStoredProcedure1.cs using System; using System.Data; using System.Data.SqlClient; using System.Data.SqlTypes; using Microsoft.SqlServer.Server; using System.Net; using System.IO; using System.Text; public partial class StoredProcedures { [Microsoft.SqlServer.Server.SqlProcedure] public static void sp_postman(string url,string json,out string result) { result = ""; try { result = PostUrl(url, json); } catch (Exception ex) { SqlContext.Pipe.Send(ex.Message); } } [Microsoft.SqlServer.Server.SqlProcedure] public static void sp_getman(string url, out string result) { result = ""; try { result = GetUrl(url); } catch (Exception ex) { SqlContext.Pipe.Send(ex.Message); } } public static string GetUrl(string url ) { HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url); req.Method = "GET"; req.ProtocolVersion = HttpVersion.Version10; if (url.ToLower().StartsWith("https:")) { ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls; } else { ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3; } HttpWebResponse res = (HttpWebResponse)req.GetResponse(); StreamReader rd = new StreamReader(res.GetResponseStream()); return rd.ReadToEnd(); } public static string PostUrl(string url, string postData) { string result = ""; HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url); req.Method = "POST"; req.Timeout = 5000; req.ContentType = "application/json"; req.ProtocolVersion = HttpVersion.Version10; if (url.ToLower().StartsWith("https:")) { ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls; } else { ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3; } byte[] data = Encoding.UTF8.GetBytes(postData); req.ContentLength = data.Length; using (Stream reqStream = req.GetRequestStream()) { reqStream.Write(data, 0, data.Length); reqStream.Close(); } HttpWebResponse resp = (HttpWebResponse)req.GetResponse(); Stream stream = resp.GetResponseStream(); //获取响应内容 using (StreamReader reader = new StreamReader(stream, Encoding.UTF8)) { result = reader.ReadToEnd(); } return result; } [Microsoft.SqlServer.Server.SqlProcedure] public static void sp_ReadTxt(string file,string coding) { try { StreamReader sr = null; switch (coding.ToLower()) { case "default": sr = new StreamReader(file, System.Text.Encoding.Default); break; case "unicode": sr = new StreamReader(file, System.Text.Encoding.Unicode); break; case "utf32": sr = new StreamReader(file, System.Text.Encoding.UTF32); break; case "utf7": sr = new StreamReader(file, System.Text.Encoding.UTF7); break; case "utf8": sr = new StreamReader(file, System.Text.Encoding.UTF8); break; case "ascii": sr = new StreamReader(file, System.Text.Encoding.ASCII); break; case "bigendianunicode": sr = new StreamReader(file, System.Text.Encoding.BigEndianUnicode); break; default: sr = new StreamReader(file, System.Text.Encoding.Default); break; } string line; while ((line = sr.ReadLine()) != null) { SqlContext.Pipe.Send(line); } sr.Close(); } catch (Exception ex) { SqlContext.Pipe.Send(ex.Message); } } } --4、SqlStoredProcedure2.cs using System; using System.Data; using System.Data.SqlClient; using System.Data.SqlTypes; using Microsoft.SqlServer.Server; public partial class myProcedure { [Microsoft.SqlServer.Server.SqlProcedure] public static void BulkCopyToXls(SqlString sql, SqlString savePath, SqlString tableName, SqlInt32 maxRecordCount) { if (sql.IsNull || savePath.IsNull || tableName.IsNull) { SqlContext.Pipe.Send(" 输入信息不完整！"); } //每个excel文件最大容纳65534 ushort _maxRecordCount = ushort.MaxValue - 1; if (maxRecordCount.IsNull == false && maxRecordCount.Value < ushort.MaxValue && maxRecordCount.Value > 0) _maxRecordCount = (ushort)maxRecordCount.Value; ExportXls(sql.Value, savePath.Value, tableName.Value, _maxRecordCount); } private static void ExportXls(string sql, string savePath, string tableName, System.UInt16 maxRecordCount) { //创建文件路径 if (System.IO.Directory.Exists(savePath) == false) { System.IO.Directory.CreateDirectory(savePath); } using (SqlConnection conn = new SqlConnection("context connection=true")) { conn.Open(); using (SqlCommand command = conn.CreateCommand()) { command.CommandText = sql; using (SqlDataReader reader = command.ExecuteReader()) { int i = 0; int totalCount = 0; int tick = System.Environment.TickCount; SqlContext.Pipe.Send(" 开始导出数据"); while (true) { string fileName = string.Format(@"{0}/{1}_{2}.xls", savePath, tableName, i++); int iExp = Write(reader, maxRecordCount, fileName); long size = new System.IO.FileInfo(fileName).Length; totalCount += iExp; SqlContext.Pipe.Send(string.Format(" 文件{0}, 共{1} 条, 大小{2} 字节", fileName, iExp, size.ToString("###,###"))); if (iExp < maxRecordCount) break; } tick = System.Environment.TickCount - tick; SqlContext.Pipe.Send(" 导出数据完成"); SqlContext.Pipe.Send("-------"); SqlContext.Pipe.Send(string.Format(" 共{0} 条数据，耗时{1}ms", totalCount, tick)); } } } } private static void WriteObject(ExcelWriter writer, object obj, System.UInt16 x, System.UInt16 y) { //判断写数字还是写字符 string type = obj.GetType().Name.ToString(); switch (type) { case "SqlBoolean": case "SqlByte": case "SqlDecimal": case "SqlDouble": case "SqlInt16": case "SqlInt32": case "SqlInt64": case "SqlMoney": case "SqlSingle": if (obj.ToString().ToLower() == "null") writer.WriteString(x, y, obj.ToString()); else writer.WriteNumber(x, y, Convert.ToDouble(obj.ToString())); break; default: writer.WriteString(x, y, obj.ToString()); break; } } private static int Write(SqlDataReader reader, System.UInt16 count, string fileName) { int iExp = count; ExcelWriter writer = new ExcelWriter(fileName); writer.BeginWrite(); try { //写字段信息 for (System.UInt16 j = 0; j < reader.FieldCount; j++) { writer.WriteString(0, j, reader.GetName(j)); } //循环一行一行读入数据 for (System.UInt16 i = 1; i <= count; i++) { if (reader.Read() == false) { iExp = i - 1; break; } //循环一格一格写入数据 for (System.UInt16 j = 0; j < reader.FieldCount; j++) { WriteObject(writer, reader.GetSqlValue(j), i, j); } } } catch (Exception ex) { throw ex; } finally { writer.EndWrite(); } return iExp; } public class ExcelWriter { System.IO.FileStream _wirter; //创建文件 public ExcelWriter(string strPath) { _wirter = new System.IO.FileStream(strPath, System.IO.FileMode.OpenOrCreate); } //写数组 private void _writeFile(System.UInt16[] values) { foreach (System.UInt16 v in values) { byte[] b = System.BitConverter.GetBytes(v); _wirter.Write(b, 0, b.Length); } } //写文件头 public void BeginWrite() { _writeFile(new System.UInt16[] { 0x809, 8, 0, 0x10, 0, 0 }); } //文件尾 public void EndWrite() { _writeFile(new System.UInt16[] { 0xa, 0 }); _wirter.Close(); } //写数字到单元格 public void WriteNumber(System.UInt16 x, System.UInt16 y, double value) { _writeFile(new System.UInt16[] { 0x203, 14, x, y, 0 }); byte[] b = System.BitConverter.GetBytes(value); _wirter.Write(b, 0, b.Length); } //写字符到单元格 public void WriteString(System.UInt16 x, System.UInt16 y, string value) { byte[] b = System.Text.Encoding.Default.GetBytes(value); _writeFile(new System.UInt16[] { 0x204, (System.UInt16)(b.Length + 8), x, y, 0, (System.UInt16)b.Length }); _wirter.Write(b, 0, b.Length); } } };