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oracle sql select field names

See the following products … There are two ways to workaround this and reference a table or field name that contains dashes/hyphens or starts with an underscore character. Is this a case for a pivot? SELECT customer_name, count(*) cnt from dtb_customer group by customer_name having count(*) > 1 Dave All 4 are single selects … SQL Aliases. 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. Alias Column Syntax 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. Oracle has not exposed this interface to-date as far as I know anyway. Document your data and gather tribal knowledge with Data Dictionary & Data Catalog, Business Glossary, and ERDs. SQL aliases are used to give a table, or a column in a table, a temporary name. Query was executed under the Oracle9i Database version. An alias only exists for the duration of that query. When you query data from a table, Oracle uses the column names of the table for displaying the column heading. This is what S.Rajaram and Michel are talking about. 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. Microsoft SQL Server is a relational database management system (RDBMS) developed by Microsoft. 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. B. This sample demonstrates use of subquery representing a separate field. These are multiple ways to find out the database name in Oracle. An alias is created with the AS keyword. For each entry in table "Venues" the query counts quantity of events from table "Events" and places this number in a column named "EventsCount". 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. With Oracle database you can use a sql query to retrieve columns names of a table. select v1. Field names with spaces must be marked off by a distinctive character used for that purpose. Microsoft Access uses back ticks. If you have privilege on dba_tab_columns and dba_tables. Query: select ora_database_name from dual; Output: Complexsql. 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. Enclose the table or field reference with double quotes. 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. The following query will retrieve all column names from the table TUTORIALS: Select column_name from user_tab_cols where table_name =3D'TUTORIALS'; The table name must be … 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. It’ll be easier to look at my code/example below. Oracle has several different built-in views that you can query to find the data you need. Click vs type, do whatever is faster for you. The FIELD_NAMES parameter is used to override the fields being in the order of the columns in the database table. There are few tables whose name gets change every month. In this SQL example, we will show you how to Get Column names using INFORMATION_SCHEMA. I hope you like this article. Sometimes there is a command, others have a SELECT query from the data dictionary. 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. 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. 1. This is the reason for what was said by JROWBOTTOM. (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.) 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', … Using the following SQL one can find tables that contain a column name. How to do that? Let’s take a look at a few ways in each database. 1. column_id - sequence number of the column as created 2. schema_name - table owner, schema name 3. table_name - table name 4. column_name - column name 5. data_type - column datatype 6. data_length - column length in bytes 7. data_precision - length: 1. for NUMBER - decimal digits, 2. for FLOAT - binary digits; 8. data_scale - digits to right of decimal point in a number 9. nullable - flag indicating if column allows nulls values 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. Oracle database Data Dictionary Query Toolbox. I ended up doing a bunch of CASE statements: Not exactly graceful, I guess - it got the job done however! In your SQL tool of choice take the following command: select table_name from all_tab_columns where column_name = 'PICK_COLUMN'; If you’ve got DBA privileges, you can try this command instead: I feel like I’m close. I’m still a little stuck on how to use a pivot here, even after reading. I have a number of custom fields defined but 4 of them are single select lists. Show Tables in Oracle SQL. SELECT COLUMN_NAME FROM ALL_COL_COMMENTS WHERE TABLE_NAME = ‘PS_JOB’; /* Sort Field by order in table*/ SELECT * FROM DBA_TAB_COLS WHERE TABLE_NAME =’PS_JOB’ ORDER by COLUMN_ID SELECT COLUMN_NAME FROM DBA_TAB_COLS WHERE TABLE_NAME =’PS_JOB’ ORDER by COLUMN_ID Currently, this is my query: How can I achieve this with SQL? "VenueNo" = v1. 2) it is possible to parse a query and get the column names from the query. Here is a view of table columns in Oracle SQL Developer: Get this interactive HTML data dictionary in minutes with Dataedo. We use to prepare extract file from oracle using extract script. SQL Server Questions and Answers. I feel like I’m close. Drag and Drop from the Tree. Use a SELECT statement or subquery to retrieve data from one or more tables, object tables, views, object views, or materialized viewsFor example to retrieve all rows from emp table. SELECT UNIQUE: one might say that there is something “distinctly” different about that statement (pun intended). 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: 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). UNIQUE and DISTINCT are reserved Oracle keywords. SQL> The SQL WHERE IN syntax. SELECT column-names FROM table-name WHERE column-name IN (values) Although SELECT UNIQUE and SELECT DISTINCT are synonymous since the queries essentially perform the same function, DISTINCT has become a standard SQL keyword. Need to handle these table names dynamically. Answer. Subscribe to our newsletter and receive the latest tips, cartoons & webinars straight to your inbox. 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. There are 3 tables: T_IN: I don't know anything about this table yet. The WHERE clause appears after the FROM clause but before the ORDER BY clause. 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; 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. It looks like you do need to use PIVOT. You can query any of these views to list all tables in Oracle. 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. The GET_HOST_ADDRESS function returns the IP address of the specified host name. 1) it is not possible to get column names from a cursor. In Oracle, you have to enclose such identifiers with double quotes as in: SELECT "FIRST NAME", "LAST NAME" FROM EMPLOYEE.

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