Wie erstelle ich SQL CREATE-Skripte für vorhandene Tabellen in SQL Server?

Generieren Sie SQL-Erstellungsskripts für vorhandene Tabellen

In SQL Server können Sie statt sys.tables direkt die folgende Abfrage verwenden Erstellen Sie CREATE-Skripte für vorhandene Tabellen:

DECLARE @table_name SYSNAME;
SELECT @table_name = 'dbo.WorkOut';

DECLARE 
  @object_name SYSNAME,
  @object_id INT;

SELECT 
  @object_name = '[' + s.name + '].[' + o.name + ']',
  @object_id = o.[object_id]
FROM sys.objects o WITH (NOWAIT)
JOIN sys.schemas s WITH (NOWAIT) ON o.[schema_id] = s.[schema_id]
WHERE s.name + '.' + o.name = @table_name
  AND o.[type] = 'U'
  AND o.is_ms_shipped = 0;

DECLARE @SQL NVARCHAR(MAX) = '';

WITH index_column AS
(
  SELECT 
    ic.[object_id],
    ic.index_id,
    ic.is_descending_key,
    ic.is_included_column,
    c.name
  FROM sys.index_columns ic WITH (NOWAIT)
  JOIN sys.columns c WITH (NOWAIT) ON ic.[object_id] = c.[object_id] AND ic.column_id = c.column_id
  WHERE ic.[object_id] = @object_id
),
fk_columns AS
(
  SELECT 
    k.constraint_object_id,
    cname = c.name,
    rcname = rc.name
  FROM sys.foreign_key_columns k WITH (NOWAIT)
  JOIN sys.columns rc WITH (NOWAIT) ON rc.[object_id] = k.referenced_object_id AND rc.column_id = k.referenced_column_id 
  JOIN sys.columns c WITH (NOWAIT) ON c.[object_id] = k.parent_object_id AND c.column_id = k.parent_column_id
  WHERE k.parent_object_id = @object_id
)
SELECT @SQL = 'CREATE TABLE ' + @object_name + CHAR(13) + '(' + CHAR(13) + STUFF((
  SELECT CHAR(9) + ', [' + c.name + '] ' + 
      CASE WHEN c.is_computed = 1
          THEN 'AS ' + cc.[definition] 
          ELSE UPPER(tp.name) + 
              CASE WHEN tp.name IN ('varchar', 'char', 'varbinary', 'binary', 'text')
                     THEN '(' + CASE WHEN c.max_length = -1 THEN 'MAX' ELSE CAST(c.max_length AS VARCHAR(5)) END + ')'
                   WHEN tp.name IN ('nvarchar', 'nchar', 'ntext')
                     THEN '(' + CASE WHEN c.max_length = -1 THEN 'MAX' ELSE CAST(c.max_length / 2 AS VARCHAR(5)) END + ')'
                   WHEN tp.name IN ('datetime2', 'time2', 'datetimeoffset') 
                     THEN '(' + CAST(c.scale AS VARCHAR(5)) + ')'
                    WHEN tp.name IN ('decimal', 'numeric')
                     THEN '(' + CAST(c.[precision] AS VARCHAR(5)) + ',' + CAST(c.scale AS VARCHAR(5)) + ')'
                    ELSE ''
                END +
                CASE WHEN c.collation_name IS NOT NULL THEN ' COLLATE ' + c.collation_name ELSE '' END +
                CASE WHEN c.is_nullable = 1 THEN ' NULL' ELSE ' NOT NULL' END +
                CASE WHEN dc.[definition] IS NOT NULL THEN ' DEFAULT' + dc.[definition] ELSE '' END + 
                CASE WHEN ic.is_identity = 1 THEN ' IDENTITY(' + CAST(ISNULL(ic.seed_value, '0') AS CHAR(1)) + ',' + CAST(ISNULL(ic.increment_value, '1') AS CHAR(1)) + ')' ELSE '' END 
      END + CHAR(13)
  FROM sys.columns c WITH (NOWAIT)
  JOIN sys.types tp WITH (NOWAIT) ON c.user_type_id = tp.user_type_id
  LEFT JOIN sys.computed_columns cc WITH (NOWAIT) ON c.[object_id] = cc.[object_id] AND c.column_id = cc.column_id
  LEFT JOIN sys.default_constraints dc WITH (NOWAIT) ON c.default_object_id != 0 AND c.[object_id] = dc.parent_object_id AND c.column_id = dc.parent_column_id
  LEFT JOIN sys.identity_columns ic WITH (NOWAIT) ON c.is_identity = 1 AND c.[object_id] = ic.[object_id] AND c.column_id = ic.column_id
  WHERE c.[object_id] = @object_id
  ORDER BY c.column_id
  FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'), 1, 2, CHAR(9) + ' ')
  + ISNULL((SELECT CHAR(9) + ', CONSTRAINT [' + k.name + '] PRIMARY KEY (' + 
                  (SELECT STUFF((
                       SELECT ', [' + c.name + '] ' + CASE WHEN ic.is_descending_key = 1 THEN 'DESC' ELSE 'ASC' END
                       FROM sys.index_columns ic WITH (NOWAIT)
                       JOIN sys.columns c WITH (NOWAIT) ON c.[object_id] = ic.[object_id] AND c.column_id = ic.column_id
                       WHERE ic.is_included_column = 0
                           AND ic.[object_id] = k.parent_object_id 
                           AND ic.index_id = k.unique_index_id     
                       FOR XML PATH(N''), TYPE).value('.', 'NVARCHAR(MAX)'), 1, 2, ''))
              + ')' + CHAR(13)
              FROM sys.key_constraints k WITH (NOWAIT)
              WHERE k.parent_object_id = @object_id 
                  AND k.[type] = 'PK'), '') + ')'  + CHAR(13)
  + ISNULL((SELECT (
      SELECT CHAR(13) +
           'ALTER TABLE ' + @object_name + ' WITH' 
          + CASE WHEN fk.is_not_trusted = 1 
              THEN ' NOCHECK' 
              ELSE ' CHECK' 
            END + 
            ' ADD CONSTRAINT [' + fk.name  + '] FOREIGN KEY(' 
            + STUFF((
              SELECT ', [' + k.cname + ']'
              FROM fk_columns k
              WHERE k.constraint_object_id = fk.[object_id]
              FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'), 1, 2, '')
             + ')' +
            ' REFERENCES [' + SCHEMA_NAME(ro.[schema_id]) + '].[' + ro.name + '] ('
            + STUFF((
              SELECT ', [' + k.rcname + ']'
              FROM fk_columns k
              WHERE k.constraint_object_id = fk.[object_id]
              FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'), 1, 2, '')
             + ')'
          + CASE 
              WHEN fk.delete_referential_action = 1 THEN ' ON DELETE CASCADE' 
              WHEN fk.delete_referential_action = 2 THEN ' ON DELETE SET NULL'
              WHEN fk.delete_referential_action = 3 THEN ' ON DELETE SET DEFAULT' 
              ELSE '' 
            END
          + CASE 
              WHEN fk.update_referential_action = 1 THEN ' ON UPDATE CASCADE'
              WHEN fk.update_referential_action = 2 THEN ' ON UPDATE SET NULL'
              WHEN fk.update_referential_action = 3 THEN ' ON UPDATE SET DEFAULT'  
              ELSE '' 
            END 
          + CHAR(13) + 'ALTER TABLE ' + @object_name + ' CHECK CONSTRAINT [' + fk.name  + ']' + CHAR(13)
      FROM sys.foreign_keys fk WITH (NOWAIT)
      JOIN sys.objects ro WITH (NOWAIT) ON ro.[object_id] = fk.referenced_object_id
      WHERE fk.parent_object_id = @object_id
      FOR XML PATH(N''), TYPE).value('.', 'NVARCHAR(MAX)')), '')
  + ISNULL(((SELECT
       CHAR(13) + 'CREATE' + CASE WHEN i.is_unique = 1 THEN ' UNIQUE' ELSE '' END 
              + ' NONCLUSTERED INDEX [' + i.name + '] ON ' + @object_name + ' (' +
              STUFF((
              SELECT ', [' + c.name + ']' + CASE WHEN c.is_descending_key = 1 THEN ' DESC' ELSE ' ASC' END

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