The reason is that the getTables() does pattern matching on the query for the table and the _ character is a wildcard in SQL. dyarosh asked on 2013-05-06. select NVL ((select 'Y' from dual where exists (select 1 from sales where sales_type = 'Accessories')),'N') as rec_exists from dual 1.Dual table will return 'Y' if record exists in sales_type table 2.Dual table will return null if no record exists in sales_type table and NVL will convert that to 'N' Help to check if Oracle table exists. I have a script where I am creating a lot of tables with sequences and triggers. Last Modified: 2013-05-08. 25,562 Views. Oracle does not provide IF EXISTS clause in the DROP TABLE statement, but you can use a PL/SQL block to implement this functionality and prevent from errors then the table does not exist. I am trying to write a script which allows a user to select the what manipulation he needs to do on a table. In the dialect for procedural SQL in MSSQL and Sybase, there's a useful little idiom for checking whether rows exist on a table, and it looks like this... if exists (select 'x' from foo where bar) /* found, do something */ else /* not found, do something else */ You can query catalogs views (ALL_TABLES or USER_TABLE i.e) to check if the required table exists: Trying to check is table exist before create in Oracle. Viewed 6k times 1. SELECT * FROM dba_tables where table_name = 'table_name'; Check if record exists using the Count() function. Find some query but it didn't work for me. How might I achieve this. Equivalent for EXISTS() in an IF statement? Active 4 years, 1 month ago. Suppose you are checking for the existence of a table named EMPLOYEE_SALARY. How can I check if a table, sequence or trigger already exists so I don't try and create it? If the count is greater than 0 means, the records exist else not exist. Query Catalog Views. 2 Solutions. How to check if a value (null/non null) exists in database table using stored pro; Check to see weather the column already exists, if not add the column; to check if a table exists; Is there a way to check the order in which SET INTEGRITY needs to be applied? Below are the examples to check if a record exists using PL/SQL in Oracle. Subject: [teradata-l] Check whether table exist or not using bteq. IF((SELECT count(*) FROM dba_tables where table_name = 'EMPLOYEE') <= 0) THEN create table EMPLOYEE ( ID NUMBER(3), NAME VARCHAR2(30) NOT NULL ) END IF; Check for existence of a table; Q: Drop table and check if table exists Check if a table exists in an oracle sql database with c#. set serveroutput on declare c varchar2(10); begin select case when exists (select * from my_table) then 'has rows' else 'no rows' end into c from dual; dbms_output.put_line(c); end; / Note that both the EXISTS and rownum = 1 version will stop on the first row found, and that's the point, so we don't need to read the whole table/index. I realize I could use the following query to check if a table exists or not. Posted by preetipatil (Teradata) on Oct 26 at 2:44 AM . Make sure to check the table name from the resultset with an equals match. The following Oracle PL/SQL block will use the count() function in implicit cursor to count the records for particular criteria. DROP TABLE IF EXISTS `table_name`; This way, if the table doesn't exist, the DROP doesn't produce an error, and the script can continue. The former is much faster if you are only searching for a single table. Does Oracle have a similar mechanism? Search for most of the post from Stackoverflow and others too. How to check if a table exists in an Oracle SQL Script. I want to check if the table exists or not. Ask Question Asked 9 years ago. Thanks in advance Oracle Database; 21 Comments. If it exists I will continue the other things or else I exit saying table doesn't exist. Can anyone tell me how to check if table exists or not.if table exist then insert records .if not exist create a table.is this possible using bteq? Record exists using the count ( ) in an Oracle SQL script ; Q: Drop and! Following Oracle PL/SQL block will use the count ( ) in an if statement SQL script continue! A table exists Help to check if a table else not exist for exists )... 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