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14 wrz 2017 · Specify ALL if you want the database to return all rows selected, including all copies of duplicates. The default is ALL . I don't recall off-hand if any other databases support SELECT ALL .
The Oracle ALL operator is used to compare a value to a list of values or result set returned by a subquery. The following shows the syntax of the ALL operator used with a list or a subquery: operator ALL ( v1, v2, v3) operator ALL ( subquery)
Specify query_name followed by a period and the asterisk to select all columns from the specified subquery block. For query_name, specify a subquery block name already specified in the subquery_factoring_clause.
In Oracle, it's possible to do a SELECT statement that returns the row number as a column in your result set. For example, SELECT rownum, column1, column2 FROM table returns: rownum colum...
The ALL comparison condition is used to compare a value to a list or subquery. It must be preceded by =, !=, >, <, <=, >= and followed by a list or subquery. When the ALL condition is followed by a list, the optimizer expands the initial condition to all elements of the list and strings them together with AND operators, as shown below.
To retrieve data from one or more columns of a table, you use the SELECT statement with the following syntax: SELECT . column_1, . column_2, . ... FROM . table_name; Code language: SQL (Structured Query Language) (sql) In this SELECT statement: First, specify the table name from which you want to query the data.
The syntax for the SELECT statement in Oracle/PLSQL is: SELECT expressions. FROM tables. [WHERE conditions]; Parameters or Arguments. expressions. The columns or calculations that you wish to retrieve. Use * if you wish to select all columns. tables. The tables that you wish to retrieve records from.
