Khóa học miễn phí PostgreSQL – Select Query nhận dự án làm có lương

PostgreSQL – SELECT Query PostgreSQL SELECT statement is used to fetch the data from a database table, which returns data in the form of result table. These result tables are called result-sets. Syntax The basic syntax of SELECT statement is as follows − SELECT column1, column2, columnN FROM table_name; Here, column1, column2…are the fields of […]

Khóa học miễn phí PostgreSQL – Schema nhận dự án làm có lương

PostgreSQL – Schema A schema is a named collection of tables. A schema can also contain views, indexes, sequences, data types, operators, and functions. Schemas are analogous to directories at the operating system level, except that schemas cannot be nested. PostgreSQL statement CREATE SCHEMA creates a schema. Syntax The basic syntax of CREATE SCHEMA is […]