SQL Statements to Get Basic Info About Tables

May 21, 2013 · updated November 4, 2013

Here are two scripts I found that will help you generate basic info about your database. This data can be useful when beginning the level of effort for a data migration.
NUMBER OF COLUMNS PER TABLE

SELECT TABLE_NAME, COUNT(*) AS COLUMN_COUNT  
  FROM INFORMATION_SCHEMA.COLUMNS   
  GROUP BY TABLE_NAME

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RECORD COUNT FOR TABLE

SELECT sc.name +'.'+ ta.name TableName  
,SUM(pa.rows) RowCnt  
FROM sys.tables ta  
INNER JOIN sys.partitions pa  
ON pa.OBJECT_ID = ta.OBJECT_ID  
INNER JOIN sys.schemas sc  
ON ta.schema_id = sc.schema_id  
WHERE ta.is_ms_shipped = 0 AND pa.index_id IN (1,0)  
GROUP BY sc.name,ta.name  
ORDER BY SUM(pa.rows) DESC

FOREIGN KEY CONSTRAINTS (Relationships)

SELECT TABLE_NAME, CONSTRAINT_NAME  
  FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS   
  WHERE CONSTRAINT_TYPE = 'FOREIGN KEY'  
  ORDER BY TABLE_NAME

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