How Can I Generate SQL CREATE Table Scripts from Existing Tables?

SQL CREATE script using query to generate existing table

While this query itself does not directly generate a CREATE script, it can be derived from schema information stored in SQL Server.

Method:

1. Identify the target table and retrieve its details (columns, indexes, constraints).
2. Build DDL scripts based on collected information.

Code:

<code class="language-sql">DECLARE @table_name SYSNAME = 'dbo.MyTable';

DECLARE @DDL NVARCHAR(MAX) = 'CREATE TABLE ' + QUOTENAME(@table_name) + ' (';

SELECT @DDL += CHAR(13) + '    [' + c.name + '] ' + 
                CASE WHEN c.is_nullable = 1 THEN 'NULL' ELSE 'NOT NULL' END + ','
FROM sys.columns c
WHERE c.[object_id] = OBJECT_ID(@table_name);

SET @DDL = LEFT(@DDL, LEN(@DDL) - 1) + ')';

SELECT @DDL += CHAR(13) + ' CONSTRAINT [PK_' + @table_name + '] PRIMARY KEY (' + 
                STUFF((SELECT ', [' + c.name + ']' FROM sys.index_columns c
                        WHERE c.[object_id] = OBJECT_ID(@table_name) AND c.index_id = 1), 1, 2, '') + ')';

SELECT @DDL += CHAR(13) + ' WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF);';

PRINT @DDL;</code>

Output example:

<code class="language-sql">CREATE TABLE [dbo].[MyTable] (
    [ID] INT NOT NULL,
    [Name] VARCHAR(50) NULL,
    [Age] INT NULL,
    CONSTRAINT [PK_MyTable] PRIMARY KEY ([ID]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF);</code>

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