postgresql-9.1

I'm looking to aggregate data by the end date of a dataset with some leading period rather than the start. For example, I want to query a table and return the count of matching results 30 days PRIOR to the end date of the date shown in the results. The original table would contain ONLY the date a sale was made (timestamp). Example: sales_timestamp ------------------ 2015-08-05 12:00:00 2015-08-06 13:00:00 2015-08-25 12:31:00 2015-08-26 01:02:00 2015-08-27 02:03:00 2015-08-29 04:23:00 2015-09-01 12:00:00 2015-09-02 12:00:00 2015-09-08 00:00:00 An example of the resulting query output would be:

I have a prefs table, and here are the relevant columns: mydb=> SELECT pref_id, pref_name, pref_value FROM prefs; pref_id | pref_name | pref_value ---------+--------------+---------------- 1 | PagerNumber | 2125551234 2 | PagerCarrier | @att.com 3 | PagerCarrier | @something.com I want to produce something like this: section | pager_number | pager_carrier ---------+----------------+--------------- 1 | 2125551234 | 2 | | @att.com 3 | | @something.com So I used crosstab, following this example on stackoverflow: PostgreSQL Crosstab Query SELECT row_name AS section, category_1::text AS pager

Hi I'm using the below code to retrieve the file from the postgresql bytea using java, but inside the file I'm getting numbers like 314530413142313141 File file = new File("c:/test.doc"); FileOutputStream fos = new FileOutputStream(file); ResultSet rs = st.executeQuery("SELECT * FROM test_bytea where id=" + 1); if (rs != null) { while (rs.next()) { byte[] fileBytes = new byte[1024]; InputStream is = rs.getBinaryStream("type_file"); while (is.read(fileBytes) > 0) { fos.write(fileBytes); } // use the stream in some way here } rs.close(); } Please let me know what goes wrong in my code? The data

I have the following table: CREATE TABLE lawyer ( id SERIAL PRIMARY KEY, name VARCHAR NOT NULL UNIQUE, name_url VARCHAR check(translate(name_url, 'abcdefghijklmnopqrstuvwxyz-', '') = '') NOT NULL UNIQUE ); I want to SELECT * FROM lawyer where name_url = "john-doe" Character literals are put into single quotes: SELECT * FROM lawyer where name_url = 'john-doe'; See the manual for details: https://www.postgresql.org/docs/current/static/sql-syntax-lexical.html#SQL-SYNTAX-CONSTANTS Looking for exact match: select column1, column2 from mytable where column2 like 'string'; Pattern Match can be

Edit : SOLVED Right. I found the thing that confused me. I use pgadmin to create tables and others database internals, checked right now: if at least one letter in the name (table name, column name, pk name, etc) is in the upper case, then pgadmin uses it in the SQL creation script as it is, using double quotes, so PostgreSQL interprets the name as it was written. If run the following script: CREATE TABLE SAMPLE ( ID integer NOT NULL, TITLE character varying(100) NOT NULL, CONSTRAINT SAMPLE_ID_PK PRIMARY KEY (ID) ) WITH ( OIDS=FALSE ); ALTER TABLE SAMPLE OWNER TO postgres;_ it creates