QueryCAT Logo
Search 5,000,000+ questions and answers.

Frequently Asked Questions

How can we execute dynamic SQL From PL/SQL block?

Oracle FAQs - Page 1
Hi there - I am new to Oracle (used to Ingres).I am having trouble creating a database.I keep getting the following oracle errors.ORA-01501ORA-01519ORA-00604ORA-30012Can you tell me what I am doing incorrectly?Many thankseibbed

Can one use dynamic SQL statements from PL/SQL?

PL/SQL FAQ - Oracle FAQ
Starting from Oracle8i one can use the "EXECUTE IMMEDIATE" statement to execute dynamic SQL and PL/SQL statements (statements created at run-time). Look at these examples. Note that the statements within quotes are NOT semicolon terminated: EXECUTE IMMEDIATE 'CREATE TABLE x (a NUMBER)'; -- Using bind variables... sql_stmt := 'INSERT INTO dept VALUES (:1, :2, :3)'; EXECUTE IMMEDIATE sql_stmt USING dept_id, dept_name, location; -- Returning a cursor..

Can one execute an operating system command from PL/SQL?

PL/SQL FAQ - Oracle FAQ
There is no direct way to execute operating system commands from PL/SQL. PL/SQL doesn't have a "HOST" command, like in SQL*Plus, that allows users to call OS commands. Nevertheless, the following workarounds can be used: Write an external program (using one of the precompiler languages, OCI or Perl with Oracle access modules) to act as a listener on a database pipe (SYS.DBMS_PIPE). Your PL/SQL program then put requests to run commands in the pipe, the listener picks it up and run the requests.

Is there a limit on the size of a PL/SQL block?

PL/SQL FAQ - Oracle FAQ
Yes, the max size is not an explicit byte limit, but related to the parse tree that is created when you compile the code. You can run the following select statement to query the size of an existing package or procedure: SQL> select * from dba_object_size where name = 'procedure_name';

What are the Blocks in PL/SQL?

PL/SQL FAQ - Page 2
Latest Answer: Hi All,I am new to this community. It seems the question is related to Begin End block of PL/SQL. Se... Latest Answer: You must be speaking about PLS_INTEGER. PLS_INTEGER, uses machine-arithmetic unlike BINARY_INTEGER... Latest Answer: DESC will display the values in DESCending order when used in an ORDER BY clause.For example:SELECT ... Latest Answer: In hash join hash table gets build using the inputs. Nested loops as the name implies uses looping c..

How Do I Continue After a PL/SQL Exception?

G Frequently Asked Questions About PL/SQL
By default, you put an exception handler at the end of a subprogram to handle exceptions that are raised anywhere inside the subprogram. To continue executing from the spot where an exception happens, enclose the code that might raise an exception inside another BEGIN-END block with its own exception handler. For example, you might put separate BEGIN-END blocks around groups of SQL statements that might raise NO_DATA_FOUND, or around arithmetic operations that might raise DIVIDE_BY_ZERO.

What is the difference between SQL and PL/SQL?

PL/SQL FAQ - Oracle FAQ
SQL is a limited language that allows you to directly interact with the database. You can write queries (SELECT), manipulate objects (DDL) and data (DML) with SQL. However, SQL doesn't include all the things that normal programming languages have, such as loops and IF...THEN...ELSE statements. PL/SQL is a normal programming language that includes all the features of most other programming languages.

What is the SQL Execute window?

Rockton Software | F.A.Q.
The SQL Execute window offers the ability to execute Transact-SQL queries from within your Great Plains SQL version system without needing additional SQL Administration Utilities loaded. The result set can be displayed as text or as a Listview. However, one of the best features is that you can use Dexterity Technical names when writing your query and they will automatically be converted into the correct physical name for the field or table prior to execution.

What is the difference between sql/pl-sql/embeded sql?

PL/SQL FAQ
Latest Answer: SQL is a structured query language.Used to perform operations such as retrieval,updations,insertions... How can I use the bind variable in a report to create an output file. For example I give the starting... What is the difference between IS/AS while creating a procedure ?i.e Create or Replace procedure is/as... How to write a query or procedure or function to retrieve all the tables from database where the table...

What is PL/SQL and what is it used for?

PL/SQL FAQ - Oracle FAQ
SQL is a declarative language that allows database programmers to write a SQL declaration and hand it to the database for execution. As such, SQL cannot be used to execute procedural code with conditional, iterative and sequential statements. To overcome this limitation, PL/SQL was created. PL/SQL is Oracle's Procedural Language extension to SQL. PL/SQL's language syntax, structure and data types are similar to that of Ada.

Can one print to the screen from PL/SQL?

PL/SQL FAQ - Oracle FAQ
One can use the DBMS_OUTPUT package to write information to an output buffer. This buffer can be displayed on the screen from SQL*Plus if you issue the SET SERVEROUTPUT ON; command. For example: set serveroutput on begin dbms_output.put_line('Look Ma, I can print from PL/SQL!!!'); end; / DBMS_OUTPUT is useful for debugging PL/SQL programs. However, if you print too much, the output buffer will overflow. In that case, set the buffer size to a larger value, eg.

Can one call DDL statements from PL/SQL?

PL/SQL FAQ - Oracle FAQ
One can call DDL statements like CREATE, DROP, TRUNCATE, etc. from PL/SQL by using the "EXECUTE IMMEDIATE" statement (native SQL). Examples: begin EXECUTE IMMEDIATE 'CREATE TABLE X(A DATE)'; end; begin execute Immediate 'TRUNCATE TABLE emp'; end; DECLARE var VARCHAR2(100); BEGIN var := 'CREATE TABLE temp1(col1 NUMBER(2))'; EXECUTE IMMEDIATE var; END; Users running Oracle versions below Oracle 8i can look at the DBMS_SQL package (see FAQ about Dynamic SQL).

Are Stored Procedures (PL/SQL) Supported?

Oracle ODBC Driver, Microsoft ODBC for Oracle Downloads
Yes. The DataDirect Connect Series Oracle drivers fully support returning result sets (including multiple result sets) generated from PL/SQL stored procedures against 7, 8, 8i, 9i, and 10g servers. This implementation is: Flexible-You can call any stored procedure without worrying about data integrity or the size of result sets.

When Should I Use Bind Variables with PL/SQL?

G Frequently Asked Questions About PL/SQL
When you imbed an INSERT, UPDATE, DELETE, or SELECT SQL statement directly in your PL/SQL code, PL/SQL turns the variables in the WHERE and VALUES clauses into bind variables automatically. Oracle can reuse these SQL statement each time the same code is executed. To run similar statements with different variable values, you can save parsing overhead by calling a stored procedure that accepts parameters, then issues the statements with the parameters substituted in the right places.

How Can I Use Regular Expressions with PL/SQL?

G Frequently Asked Questions About PL/SQL
You can test or manipulate strings using the built-in functions REGEXP_INSTR, REGEXP_REPLACE, and REGEXP_SUBSTR. Oracle's regular expression features use characters like '.', '*', '^', and '$' that you might be familiar with from UNIX or Perl programming. For multi-language programming, there are also extensions such as '[:lower:]' to match a lowercase letter, instead of '[a-z]' which does not match lowercase accented letters.

What Can I Do with Objects and Object Types in PL/SQL?

G Frequently Asked Questions About PL/SQL
You can create object types by issuing the SQL statement CREATE TYPE using dynamic SQL (the EXECUTE IMMEDIATE statement). You can use objects to group related values, as you would do with records, with the added advantage that you can store objects directly in the database. You can also create varrays, nested tables, and associative arrays of objects. You can write PL/SQL procedures and functions that accept objects as parameters.

How Do I Input or Output Data with PL/SQL?

G Frequently Asked Questions About PL/SQL
All other PL/SQL I/O is done through APIs that interact with other programs. For example, the DBMS_OUTPUT package has procedures such as PUT_LINE. To see the result outside of PL/SQL requires another program, such as SQL*Plus, to read and display the data passed to DBMS_OUTPUT. (SQL*Plus does not display DBMS_OUTPUT data unless you issue the command SET SERVEROUTPUT ON first.

How can you generate debugging output from PL/SQL?

AKAAS :: Oracle Frequently Asked Questions (FAQs)
Expected answer: Use the DBMS_OUTPUT package. Another possible method is to just use the SHOW ERROR command, but this only shows errors. The DBMS_OUTPUT package can be used to show intermediate results from loops and the status of variables as the procedure is executed. The new package UTL_FILE can also be used.

Can I create Dynamic XML documents from SQL Data?

Virtuoso FAQs
Yes, Virtuoso implements SQL extensions that enable the results of standard SQL queries to be transformed into XML documents, these documents are openly accessible to user agents such as Web Browsers via HTTP and/or WebDAV. It is important to note that these SQL-XML documents are URL accessible, and sensitive to the underlying changes that occur in the underlying database tables from which they have been derived.

Explore Other Topics

Why should I apply for a Florida Non-resident Concealed Handgun License?
I am tired of my curly perm, can I get my straight hair back?
Where can I get a VIN Search?
Which shot records should I have for my dog or puppy?
Can I receive pay-per-view channels like HBO?
Do you fasten Edeck® composite deckingdown with screws?
Who is the girl in the 'Its OK' video?
How do I calculate the distance between two waypoints?
Can you appraise an art work or artifact for me?
Why can't I send my order to a PO Box or APO and or Military address?
How dangerous is skydiving?
When is the best time to put down crabgrass preventer?
What does the color coding mean on the Life Themes list?
How do I obtain Letters Probate?
More Questions >>

© Copyright 2007-2009 QueryCAT
About • Webmasters • Contact