Einige nützliche SQL Statements, die ich gesammelt habe...

[sniper_w]

Bitte die Hinweise in den nachfolgenden Antworten beachten, da diese Statements nicht für alle DBMS gelten!

SQL-Code:

-- To list all the tables in a database.
SELECT * FROM information_schema.tables

--List all the views in a database
SELECT * FROM information_schema.tables WHERE table_type = 'view'

--List all the tables in 'MeinTabelle' catalog excluding some of the system tables

SELECT * FROM INFORMATION_SCHEMA.TABLES
WHERE 
   TABLE_CATALOG = 'MeinTabelle'
   AND TABLE_TYPE    = 'BASE TABLE'
   AND TABLE_NAME != 'dtproperties'
   AND TABLE_NAME != 'sysconstraints'
   AND TABLE_NAME != 'syssegments'
   AND TABLE_NAME != 'sysdiagrams'
ORDER BY TABLE_NAME ASC

--List all the columns in the database that has the word '%mit%' in it.
SELECT * FROM information_schema.columns 
WHERE column_name LIKE '%mit%'

--List all columns in the database that are identity fields.

SELECT INFORMATION_SCHEMA.COLUMNS.* 
from INFORMATION_SCHEMA.COLUMNS WHERE 
(SELECT COLUMNPROPERTY(OBJECT_ID(TABLE_NAME), INFORMATION_SCHEMA.COLUMNS.COLUMN_NAME, 'IsIdentity')) = 1

--List all columns in the database that are computed fields.

SELECT INFORMATION_SCHEMA.COLUMNS.* 
from information_schema.columns where 
(SELECT COLUMNPROPERTY(OBJECT_ID(TABLE_NAME), INFORMATION_SCHEMA.COLUMNS.COLUMN_NAME, 'IsComputed'))=1

--There are two more important information_schema views that are useful in retrieving the table constraints, 
--keys and indexes. They are information_schema.table_constraints and information_schema.key_column_usage

--List all the primary key columns in the database.

SELECT K.* 
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE K 
INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS C ON K.CONSTRAINT_NAME = C.CONSTRAINT_NAME
WHERE C.CONSTRAINT_TYPE = 'PRIMARY KEY'

-- get the column list for all tables...
SELECT 
   X.table_name,
   [Col_List] = 
   (
      SELECT TOP 1
         STUFF((   SELECT ', ' + T2.COLUMN_NAME 
            FROM INFORMATION_SCHEMA.COLUMNS AS T2 
            WHERE T2.TABLE_NAME = T1.TABLE_NAME FOR XML PATH ('')), 1, 2,'') AS COL_NAMES
      FROM INFORMATION_SCHEMA.COLUMNS AS T1
      WHERE T1.TABLE_NAME = X.table_name
      ORDER BY T1.ORDINAL_POSITION
   )
FROM information_schema.tables as X
WHERE X.table_type = 'base table'
ORDER BY X.table_name

[edit=TBx]Hinweis eingefügt Mfg, TBx[/edit]