Posts (page 60)
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3 min readTo convert minutes to days in Oracle, you can use the following SQL query:SELECT minutes/1440 AS days FROM table_name;This query will return the equivalent number of days when you provide minutes as an input. By dividing the minutes by 1440 (the number of minutes in a day), you can easily convert minutes to days in Oracle.[rating:53c0aa98-76b9-464d-9d7f-79965c5bfde8]What is the role of the interval data type in converting minutes to days in Oracle.
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6 min readIn Oracle, you can use the UTL_RAW.CAST_TO_VARCHAR2 function to convert a string into a URL-friendly format. This function converts special characters into their hexadecimal representation, making the string safe to include in a URL. You can also use the UTL_ENCODE.URL_ENCODE function to directly encode a string into a URL-friendly format. This function encodes special characters like spaces, punctuation marks, and non-ASCII characters.
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6 min readTo extract a specific part of a column using regular expressions in Oracle, you can use the REGEXP_SUBSTR function. This function allows you to extract a substring that matches a specified regular expression pattern from a column.For example, if you have a column called "description" that contains text with a specific pattern that you want to extract, you can use REGEXP_SUBSTR to do so.
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5 min readOne way to prevent the input of certain letters using Oracle is by creating a check constraint on the table column where the input is being made. You can use regular expressions to define the pattern of allowed characters and disallow certain letters. For example, you can use the REGEXP_LIKE function to check if the input contains any of the disallowed letters and raise an error if it does. Additionally, you can use triggers to validate the input before it is inserted or updated in the database.
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4 min readTo run a stored procedure in Oracle, you first need to ensure that the stored procedure has been created and is stored within the Oracle database. Once the stored procedure is created, you can run it by using the following steps:Connect to the Oracle database using a tool such as SQL*Plus, SQL Developer, or any other compatible tool.Once connected, you can execute the stored procedure by typing the command to call the procedure followed by any necessary parameters.
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8 min readTo create an inheritance table in Oracle, you can use the concept of table partitioning to achieve inheritance-like behavior. Essentially, you create a parent table that contains all the common columns and then create child tables that inherit from the parent table. Each child table contains specific columns unique to that child entity.To create a parent table, you can use the CREATE TABLE statement with the necessary columns.
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3 min readTo call a function in Oracle, you can simply use the function name followed by parentheses that may or may not contain input parameters.
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3 min readTo use the ABS function with percentages in Oracle, you simply apply the ABS function to the percentage value. The ABS function returns the absolute value of a number, regardless of its sign. This means that if you have a negative percentage value, applying the ABS function will make it positive.
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7 min readTo convert two or more rows into columns in Oracle, you can use the PIVOT clause. This allows you to aggregate values from multiple rows of a table into a single row. You first need to identify the unique identifier for each row that needs to be converted into columns. Then you can use the PIVOT clause along with an aggregation function to pivot the rows into columns based on this identifier.
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5 min readIn Oracle, you can group varchar type columns in a query by using the GROUP BY clause. The GROUP BY clause is used in conjunction with aggregate functions such as COUNT, SUM, AVG, etc. to group the results based on the values in one or more varchar type columns. When grouping varchar type columns, Oracle will treat each unique value in the column as a separate group, and the aggregate functions will be applied to each group separately.
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3 min readTo change the data type of a column in Oracle, you can use the ALTER TABLE statement with the MODIFY clause. First, identify the table and column you want to modify. Then, use the following syntax: ALTER TABLE table_name MODIFY column_name new_data_type; Replace table_name with the name of the table, column_name with the name of the column you want to modify, and new_data_type with the new data type you want to change the column to.
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5 min readTo split a table rows into fixed size chunks in Oracle, you can use the ROW_NUMBER() function and integer division to assign each row to a chunk. You can then query the table using a common table expression to select rows based on the assigned chunk number. By adjusting the chunk size and filtering criteria, you can control the size and content of each chunk. This method allows you to split a large table into smaller, more manageable chunks for processing or analysis.