Select same column name in microsoft sql server from multiple tables
Is it possible to write a query:
SELECT * from table1, table 2, table 3 ...
table1.column name like
table2.column name like
We don't know the name of our column, we say any of our columns which are in table1.column name like table2.column name in like table3.column name
employee id maybe is a column that is common to 3 tables, or
publisher id is a column that is common to 3 tables.
I can find the foreign key or primary key with a diagram in my database, but I want to write a query that shows just columns which have a same title as column name.
No clue as to why you are doing this, so a bit hard to steer, but there are a number of tables and views in the database that describe the database.
Information_Schema.Columns is probably where you should start. Note this is meta data, if you want the content of the actual tables you'll have to go a step further, and build some dynamic sql, or equivalent.
Select Column_Name,Count(*) As NumberOfOccurences From Information_Schema.Columns
will give you the column names and how often you've used them for instance.
Question when working with multiple tables with same column names, The fully-qualified name of a column is database.schema.table.column. I'm studying MS SQL, and mySQL and trying to practice using Joins (INNER and the same fields in two tables will be: SQL. SELECT incident1.incidentname SQL Server allows you to alias table names to make things a little easier to read: SQL. There's no name2 column in either CUSTOMER table - you need to rearrange the customer name columns, swapping for null to match the desired output. Once that's done, you do provide an alternative to the LEFT JOINs most of us came up with. – OMG Ponies Sep 12 '09 at 20:20
If you know the column name and want to know in which different table same column name is used then write SQL query as
SELECT schema_name(t.[schema_id]) + '.' + t.[name] AS Tables FROM sys.tables t INNER JOIN sys.columns c on t.[object_id] = c.[object_id] WHERE c.[name] = 'Your_Common_Column_Name'
You will get all the table list with their respective schema
Combine results from several SQL tables, This begs the question “How do you combine results from more than one table?” All the examples for this lesson are based on Microsoft SQL Server� Select from two tables: Example . Run the Orders Query (Orders Qry on the Query list): It lists all orders for all customers, without going into line items (order details), by retrieving related data from the Orders and Customers tables. Note the number of rows and columns; several columns are repeated more often than strictly necessary.
To get column names:
select sc.name from sysobjects so inner join syscolumns sc on so.id = sc.id where so.name = 'tableName'
Select * UNION from multiple tables with same columns, but in , My current code builds the table names using Dynamic-SQL by looping through 2 tables, dbo.Companies and dbo.[Tables to do], you get the� For an even more complex example of GROUP BY usage, let's say student might be able to assign the same subject to his name more than once (as shown in table Students_Subjects). In this scenario we might be able to count number of times each subject was assigned to a student by GROUPing by more than one column:
How to change value in columns with same name in multiple tables, The following forum(s) have migrated to Microsoft Q&A: All English SQL Server forums! Visit Microsoft Q&A to post new questions. Learn More. but actually i want to select values from two different tables. Two ways: select table1.column1, table1.column2, table2.column1 from table1, table2. If table1 has 3 records, and table2 has 4 records, this will return 3 x 4 = 12 records. Another option is to use a subquery.
INSERT (Transact-SQL), Adds one or more rows to a table or a view in SQL Server. can be specified as a linked server name, or by using the OPENDATASOURCE function. The row constructor consists of a single VALUES clause with multiple value lists You can use INSERT INTO <target_table> SELECT <columns> FROM� SYS.COLUMNS is a system catalogue view which gives the details about the columns from all the tables in the database. You can use a WHERE condition to limit the list of columns to a specific table. Here is an example: SELECT NAME, COLUMN_ID FROM SYS.COLUMNS WHERE object_id = OBJECT_ID('Sales.Orders')
Do your tables have any particular pattern in their names? If so, you can get a "list" of those tables by querying the sys.tables catalog view. Define a cursor with that query and loop through the returned rows. In the loop you use dynamic sql to generate and execute a query that selects from each table.