I have a function func1() that returns integers.
I want to write another function func2 (mode integer), which can return func1()reults Or do more things. The return value of func1() is INTEGE
Category: Postgresql
PostgresQL is an object-relational database management system (ORDBMS) based on version 4.2 of POSTGRES developed by the Department of Computer Science at the University of California, Berkeley. It has now been renamed to PostgreSQL. PostgreSQL supports most SQL standards and provides many other modern features: complex queries, foreign keys, triggers, views, transaction integrity, MVCC. Similarly, PostgreSQL can be extended in many ways, for example, by adding new data types, functions, operators, aggregate functions, and indexes. Use, modify, and distribute PostgreSQL for free, whether it is for private, commercial, or academic research.
Add a missing monthly date in the time series data in PostgreSQL
I have monthly time series data in the table, where the date is the last day of the month. Some dates are missing in the data. I want to insert these dates and add zero values for other attribute
PostgreSQL 9.6 Parallel Polymerization
PostgreSQL in version 9.6 adds support for parallel aggregation.
With 9.6, PostgreSQL introduces initial support for parallel execution
of large queries. Only strictly read-only queries wher
Database – Preventing errors from input
Is it a good practice to fully delegate data validation to database engine constraints?
Validating data from an application does not prevent invalid insertion from another software (maybe wri
install postgresql 11 on centos 7
Step 2: Add EPEL repository to CentOS 7 A number of dependencies are on the EPEL repository. Run the following command to install epel repository in your CentOS 7 machine.
sudo yum -y install
Database – When do we need to return a value from a trigger program?
The documentation on the trigger procedure (https://www.postgresql.org/docs/9.6/static/plpgsql-trigger.html) says: “The trigger function must return NULL or Record/row”.
example
CREATE
ASCII 152 Character (“ÿ”) PostgreSQL upper layer function
On the Windows 7 platform, use PostgreSQL version 9.3.9, use PgAdmin as the client, select the upper result “ÿÿÿ” on the column containing the example, and return null. If you store three Values, f