Tag: sqls
PostgreSQL extract function extracts parts from the date. Syntax of the extract function in PostgreSQL extract( unit from date ) Parameters and function argumentsdate - date, timestamp,...
PostgreSQL date_part function extracts parts from the date. The syntax of the date_part function in PostgreSQL date_part( 'unit', date ) Parameters and function argumentsdate - Date,...
PostgreSQL current_timestamp function returns the current date and time with the time zone. Syntax of the current_timestamp function in PostgreSQL current_timestamp( [ precision ] ) Parameters...
The current_time function in PostgreSQL returns the current time with the time zone. Syntax of the current_time function in PostgreSQL current_time( [ precision ] ) Parameters and function...
The current_date function in PostgreSQL returns the current date. Syntax of current_date function in PostgreSQL current_date Parameters and function argumentsThere are no parameters or...
The PostgreSQL function age returns the number of years, months, and days between two dates. Syntax of the function age in PostgreSQL age( [date1,] date2 ) Parameters and function...
PostgreSQL Alias can be used to create a temporary name for tables or columns. Column aliases are used to make it easier to read column headers in a set of results.Table aliases are used to...
Can you place comments in your SQL statements in PostgreSQL? These comments can appear in one line or cover several lines. Let's see how to do that.There are two syntaxes that you can use to...
In this tutorial, you will learn how to declare variables in PostgreSQL using syntax and examples. What is a variable in PostgreSQL? In PostgreSQL, a variable allows a programmer to temporarily...
Below is a list of data types available in PostgreSQL, which includes string, numeric, and date/time type. String data types Below are String data types in PostgreSQL :Syntax of data...
SQL Server has an interesting feature called Linked Servers. It is about linking other databases to SQL Server and using their data as local. There are many powerful open source systems written...
Thinking about security in MySQL installation, you can consider a wide range of possible procedures/recommendations and their impact on the security of your MySQL server and related...
In this post you will learn how to get the number of MySQL lines in a database. Getting the number of MySQL rows in one table To get the number of rows per table, you use the COUNT(*) operator...
In MySQL 8.0.16 optimizer has improved again! Comparisons of columns of numeric types with constants are checked and stacked or deleted for invalid values or values that are out of...
MySQL 5.7.11 introduced transparent encryption for InnoDB table space, which included support for table space files. Later, encryption for the shared table space was introduced in MySQL...
This article will show you how to create new databases and tables using SQL commands in a mysql client. It is assumed that this tool is running and connected to the MySQL database...