You can use the REGEXP_SUBSTR function in Oracle SQL to extract all words from a string column. This function allows you to specify a regular expression pattern to match words in the string. For example, you can use the following query to extract all words from a column named "text_column" in a table named "your_table":
SELECT REGEXP_SUBSTR(text_column, '\w+', 1, level) AS word FROM your_table CONNECT BY REGEXP_SUBSTR(text_column, '\w+', 1, level) IS NOT NULL;
This query will return a list of all words found in each row of the "text_column" in the "your_table" table. You can further refine the regular expression pattern to match specific criteria for words, such as including only letters or numbers, or excluding certain characters.
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What is the RTRIM function in SQL Oracle?
The RTRIM function in SQL Oracle is used to remove or trim trailing spaces from a string. It takes a string as input and returns the string with any trailing spaces removed. The syntax for the RTRIM function is:
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RTRIM(string)
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For example, the following query would remove any trailing spaces from the string 'Hello World ':
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SELECT RTRIM('Hello World ') FROM dual;
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The result would be 'Hello World'.
What is the ASCII function in SQL Oracle?
The ASCII function in SQL Oracle is used to return the ASCII code value of the first character in a string. It takes a single argument, which is a character or a string of length 1, and returns an integer representing the ASCII code value of that character.
For example, the query below will return the ASCII value of the character 'A':
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SELECT ASCII('A') FROM dual;
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The result of this query would be 65, which is the ASCII value of the character 'A'.
What is the LTRIM function in SQL Oracle?
The LTRIM function in SQL Oracle is used to remove leading characters (spaces or specified characters) from a string. It takes two arguments: the input string and the characters that you want to remove from the beginning of the string. The syntax for the LTRIM function is as follows:
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LTRIM(string, characters)
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Where:
- string: the input string from which you want to remove leading characters
- characters: the characters that you want to remove from the beginning of the string
For example, the following query removes leading spaces from the string ' Hello World':
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SELECT LTRIM(' Hello World') AS trimmed_string FROM dual;
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This will output 'Hello World' without the leading spaces.
