Using Dynamic Table Name in Select Statement To Prepare Extract File; Breadcrumb. Build up a string for the SQL statement, passing the table suffix as a parameter. Then run it using your favourite dynamic execution method. Actually we need to handle dynamic table name in select statement only not in PL/SQL Script. Please support. Set feedback off create table f (a number, b varchar2(10)); insert into f values (5,'five'); insert into f values (6,'six'); insert into f values (7,'seven'); insert into f values.
SQL UPDATE Statement The UPDATE Statement is used to modify the existing rows in a table. The Syntax for SQL UPDATE Command is: UPDATE table_name SET column_name1 = value1, column_name2 = value2. [WHERE condition] • table_name - the table name which has to be updated. • column_name1, column_name2. - the columns that gets changed. • value1, value2. - are the new values. NOTE: In the Update statement, WHERE clause identifies the rows that get affected. If you do not include the WHERE clause, column values for all the rows get affected. For Example: To update the location of an employee, the sql update query would be like, UPDATE employee SET location ='Mysore' WHERE id = 101; To change the salaries of all the employees, the query would be, UPDATE employee SET salary = salary + (salary * 0.2). Syntax The syntax for the UPDATE statement when updating a table in SQL is: UPDATE table SET column1 = expression1, column2 = expression2. [WHERE conditions]; OR The syntax for the SQL UPDATE statement when updating a table with data from another table is: UPDATE table1 SET column1 = (SELECT expression1 FROM table2 WHERE conditions) [WHERE conditions]; OR The syntax for the SQL UPDATE statement when updating multiple tables (not permitted in Oracle) is: UPDATE table1, table2. SET column1 = expression1, column2 = expression2. WHERE table1.column = table2.column [AND conditions]; Parameters or Arguments column1, column2 The columns that you wish to update. Pl Sql Script To Update Tables SyntaxExpression1, expression2 These are the new values to assign to the column1, column2. So column1 would be assigned the value of expression1, column2 would be assigned the value of expression2, and so on. WHERE conditions Optional. The conditions that must be met for the update to execute. If no conditions are provided, then all records in the table will be updated. Customer_id last_name first_name favorite_website 4000 Jackson Joe techonthenet.com 5000 Smith Jane digminecraft.com 6000 Ferguson Samantha bigactivities.com 7000 Reynolds Allen checkyourmath.com 8000 Anderson Paige NULL 9000 Johnson Derek techonthenet.com Now let's demonstrate how the UPDATE statement works by updating one column in the customers table. Enter the following UPDATE statement: UPDATE customers SET first_name = 'Judy' WHERE customer_id = 8000; There will be 1 record updated. Pl Sql Script To Update Table Syntax PdfSelect the data from the customers table again: SELECT * FROM customers; These are the results that you should see. Supplier_id supplier_name city state 100 Microsoft Redmond Washington 200 Google Mountain View California 300 Oracle Redwood City California 400 Kimberly-Clark Irving Texas 500 Tyson Foods Springdale Arkansas 600 SC Johnson Racine Wisconsin 700 Dole Food Company Westlake Village California 800 Flowers Foods Thomasville Georgia 900 Electronic Arts Redwood City California Now let's demonstrate how to use the UPDATE statement to update more than one column value at once. Enter the following UPDATE statement: UPDATE suppliers SET supplier_id = 150, supplier_name = 'Apple', city = 'Cupertino' WHERE supplier_name = 'Google'; There will be 1 record updated. Select the data from the suppliers table again: SELECT * FROM suppliers; These are the results that you should see. Supplier_id supplier_name city state 100 Microsoft Redmond Washington 150 Apple Cupertino California 300 Oracle Redwood City California 400 Kimberly-Clark Irving Texas 500 Tyson Foods Springdale Arkansas 600 SC Johnson Racine Wisconsin 700 Dole Food Company Westlake Village California 800 Flowers Foods Thomasville Georgia 900 Electronic Arts Redwood City California This UPDATE example would update the supplier_id to 150, the supplier_name to 'Apple' and city to 'Cupertino' where the supplier_name is 'Google'. Product_id product_name category_id 1 Pear 50 2 Banana 50 3 Orange 50 4 Apple 50 5 Bread 75 6 Sliced Ham 25 7 Kleenex NULL And a table called summary_data with the following data: product_id current_category 1 10 2 10 3 10 4 10 5 10 8 10 Now let's update the summary_data table with values from the products table. Enter the following UPDATE statement: UPDATE summary_data SET current_category = (SELECT category_id FROM products WHERE products.product_id = summary_data.product_id) WHERE EXISTS (SELECT category_id FROM products WHERE products.product_id = summary_data.product_id); There will be 5 records update. Sql Script Data From Table![]() Pl Sql Script To Update Table Syntax DownloadSelect the data from the summary_data table again: SELECT * FROM summary_data; These are the results that you should see: product_id current_category 1 50 2 50 3 50 4 50 5 75 8 10 This example would update the current_category field in the summary_data table with the category_id from the products table where the product_id values match. The first 5 records in the summary_data table have been updated.
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