oracle sql select field names

"Venue", ( select count (*) from "Events" e1 where e1. It supports T-SQL known as Transact-SQL (Structured Query Language) language which is the propriety Language of Microsoft and it is built on the top of ANSI SQL, which is the standard SQL language. Answer. When you query data from a table, Oracle uses the column names of the table for displaying the column heading. The UTL_INADDR package was introduced in Oracle 8.1.6 to provide a means of retrieving host names and IP addresses of remote hosts from PL/SQL. Other DBMS's use different characters to set off these field names. These are multiple ways to find out the database name in Oracle. Letâs take a look at a few ways in each database. SQL: How to select field values and return them as column names in result. We use to prepare extract file from oracle using extract script. COLUMN ALIASES are used to make column headings in your result set easier to read. Is this a case for a pivot? You can query any of these views to list all tables in Oracle. Identifying Host Names and IP Addresses in SQL and PL/SQL ; UTL_INADDR. Show Tables in Oracle SQL. SELECT column-names FROM table-name WHERE column-name IN (values) Powered by Discourse, best viewed with JavaScript enabled. I feel like Iâm close. The WHERE clause appears after the FROM clause but before the ORDER BY clause. Oracle has several different built-in views that you can query to find the data you need. Microsoft SQL Server is a relational database management system (RDBMS) developed by Microsoft. Need to handle these table names dynamically. I am trying to sum each activity stored in my DB by each of their elapsed time (field value) and then group them by week. The SQL WHERE IN syntax. Alias Column Syntax Currently, this is my query: SELECT week, activityType, SUM (elapsedTime) AS activityTotalTime FROM activity WHERE year=2017 AND activityType IN ('rockclimbing', 'hike', 'run') GROUP BY week, activityType; This produces a result like: â¦ With Oracle database you can use a sql query to retrieve columns names of a table. SQL Aliases. 1) it is not possible to get column names from a cursor. For each entry in table "Venues" the query counts quantity of events from table "Events" and places this number in a column named "EventsCount". SELECT UNIQUE: one might say that there is something âdistinctlyâ different about that statement (pun intended). Besides the SELECT statement, you can use the WHERE clause in the DELETE or UPDATE statement to specify which rows to update or delete.. Oracle WHERE examples. There are few tables whose name gets change every month. In the ApexSQL menu, select the ApexSQL Refactor menu, click the Qualify object name command, and let the add-in to complete the refactoring of SQL script with a single click: The following are examples to illustrate this: In this example, the schema will be added to object names in a SQL query. SQL> SQL> SQL> select e.deptno as "department" 2 , count(e.empno) as "number of employees" 3 from employees e 4 group by e.deptno; department number of employees ----- ----- 30 3 20 3 40 2 10 2 SQL> SQL> SQL> drop table employees; Table dropped. Oracle database Data Dictionary Query Toolbox. You are correct. UNIQUE and DISTINCT are reserved Oracle keywords. Thanks for your link. See the example from Oracle’s blog post below for explanation and example: https://blogs.oracle.com/sql/how-to-convert-rows-to-columns-and-back-again-with-sql-aka-pivot-and-unpivot. In your SQL tool of choice take the following command: select table_name from all_tab_columns where column_name = 'PICK_COLUMN'; If youâve got DBA privileges, you can try this command instead: (By default, SQL*Loader Express uses the table column definitions found in the ALL_TAB_COLUMNS view to determine the input field order and data types.) Using the following SQL one can find tables that contain a column name. Oracle has not exposed this interface to-date as far as I know anyway. B. Star Pattern by SQL in Oracle Database LISTAGG DISTINCT - Remove Duplicates - Oracle 19c; Redo Files, Redo Group and Redo Thread in Oracle Database; Oracle Database 21c is here - Innovation Release; Generate Nested JSON using SQL in Oracle Database; Parse JSON data in Oracle Database using JSON_TABLE in SQL Subscribe to our newsletter and receive the latest tips, cartoons & webinars straight to your inbox. Here is a view of table columns in Oracle SQL Developer: Get this interactive HTML data dictionary in minutes with Dataedo. Document your data and gather tribal knowledge with Data Dictionary & Data Catalog, Business Glossary, and ERDs. I’m still a little stuck on how to use a pivot here, even after reading. Click vs type, do whatever is faster for you. select t.owner as schema_name, t.table_name from sys.all_tab_columns col inner join sys.all_tables t on col.owner = t.owner and col.table_name = t.table_name where col.column_name = 'QUANTITY_BILLED' -- excluding some Oracle maintained schemas and col.owner not in ('ANONYMOUS','CTXSYS','DBSNMP','EXFSYS', 'LBACSYS', 'MDSYS', â¦ -- Query to Get Column Names From Table in SQL Server USE [SQL Tutorial] GO SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = N'NewCustomers'. Recipe #1 - Oracle 11g only Since Oracle 11g there's a method called DBMS_SQL.TO_CURSOR_NUMBER(l_rcursor) which you can use to cast a ref cursor into a cursor and use dbms_sql.describe_columns. Although SELECT UNIQUE and SELECT DISTINCT are synonymous since the queries essentially perform the same function, DISTINCT has become a standard SQL keyword. It looks like you do need to use PIVOT. I like this one a lot, the order in which I select the columns in the tree is the â¦ An alias only exists for the duration of that query. I have a number of custom fields defined but 4 of them are single select lists. In Oracle, you have to enclose such identifiers with double quotes as in: SELECT "FIRST NAME", "LAST NAME" FROM EMPLOYEE. If you have privilege on dba_tab_columns and dba_tables. Field or attribute of a function return value, for example: func_name().field_name func_name().attribute_name Schema object owned by another schema, for example: schema_name.table_name schema_name.procedure_name() schema_name.type_name.member_name() Package object owned by another user, for example: Sometimes there is a command, others have a SELECT query from the data dictionary. TABLE ALIASES are used to shorten your SQL to make it easier to read or when you are performing a self join (ie: listing the same table more than once in the FROM clause). select v1. In SQLServer SELECT table_name, column_name FROM INFORMATION_SCHEMA.COLUMNS Microsoft Access uses back ticks. It’ll be easier to look at my code/example below. Oracle ALIASES can be used to create a temporary name for columns or tables. The general syntax is. Aliases are often used to make column names more readable. I have a problem with dynamic field names in a cursor. This is the reason for what was said by JROWBOTTOM. I am using external tools to pull data from our Oracle 11g instance (our dbase used for JIRA) and am having an issue with getting data from 2 of the 4. I am trying to sum each activity stored in my DB by each of their elapsed time (field value) and then group them by week. SQL aliases are used to give a table, or a column in a table, a temporary name. Type 4 : Using dual table of Oracle. The FIELD_NAMES parameter is used to override the fields being in the order of the columns in the database table. Drag and Drop from the Tree. SELECT table_name FROM user_tables; List all Tables in Oracle database, accessed by Current user: The below query lists all tables in oracle which are accessible by the current user. For example, if I have a table named EVENT_LOG that contains eventID, eventType, eventDesc, and eventTime, then I would want to retrieve those field names from the query and nothing else. An alias is created with the AS keyword. SQL> select empno, ename, sal from emp; Or (if you want to see all the columns valuesYou can also give * which means all columns)SQL> select * from emp;If you want to see only employee names and their salaries then you can type the following statement SQL> select name, sal from emp; For example: SELECT "cust-num" FROM PUB.customer; SELECT "_name" from â¦ SQL Server Questions and Answers. For example, the following statement returns the first name and last name of employees: SELECT first_name, last_name FROM employees ORDER BY first_name; In this example, first_name and last_name column names were quite clear. Field names with spaces must be marked off by a distinctive character used for that purpose. I hope you like this article. I feel like I’m close. The complexsql is the database name on which user is been connected. select attribute_id from user_preference where user_id = X (or bubble up to selecting the actual attribute name from the attribute table based on this) and display data from the transaction table where column names, not values, are equal to the values returned as the list of attribute names. Query: select ora_database_name from dual; Output: Complexsql. The GET_HOST_ADDRESS function returns the IP address of the specified host name. Query was executed under the Oracle9i Database version. See the following products â¦ The following example shows you how to get a list from an SQL SELECT query which is located in a string and dynamically openend into a REF CURSOR. SELECT customer_name, count(*) cnt from dtb_customer group by customer_name having count(*) > 1 Dave This sample demonstrates use of subquery representing a separate field. List all Tables in Oracle database, owned by current Oracle user: The below query returns a list of all tables owned by the current user.