How can I get substring in PL SQL?

Oracle / PLSQL: SUBSTR Function

1. Description. The Oracle/PLSQL SUBSTR functions allows you to extract a substring from a string.
2. Syntax. The syntax for the SUBSTR function in Oracle/PLSQL is: SUBSTR( string, start_position [, length ] )
3. Returns. The SUBSTR function returns a string value.
4. Note.
5. Applies To.
6. Example.

What is Substr in Oracle?

The SUBSTR functions returns the specified number (substring_length) of characters from a particular position of a given string. If the position is positive, then Oracle Database counts from the beginning of char to find the first character. If the position is negative, then Oracle counts backward from the end of char.

What is Instr in Oracle SQL?

The Oracle INSTR function is used to search string for substring and find the location of the substring in the string. If a substring that is equal to substring is found, then the function returns an integer indicating the position of the first character of this substring. INSTRB uses bytes instead of characters.

How do I remove a character from a string in PL SQL?

Oracle / PLSQL: TRIM Function

1. Description. The Oracle/PLSQL TRIM function removes all specified characters either from the beginning or the end of a string.
2. Syntax. The syntax for the TRIM function in Oracle/PLSQL is: TRIM( [ [ LEADING | TRAILING | BOTH ] trim_character FROM ] string1 )
3. Returns.
4. Note.
5. Applies To.
6. Example.

What are the strings in PL / SQL called?

PL/SQL – Strings. The string in PL/SQL is actually a sequence of characters with an optional size specification. The characters could be numeric, letters, blank, special characters or a combination of all. Fixed-length strings − In such strings, programmers specify the length while declaring the string.

What’s the maximum length of a PL / SQL string?

PL/SQL – Strings. Variable-length strings − In such strings, a maximum length up to 32,767, for the string is specified and no padding takes place. Character large objects (CLOBs) − These are variable-length strings that can be up to 128 terabytes. PL/SQL strings could be either variables or literals.

What is the syntax for substr in PLSQL?

Syntax. The syntax for the SUBSTR function in Oracle/PLSQL is: SUBSTR( string, start_position length ] )&] Parameters or Arguments string The source string. start_position The starting position for extraction. The first position in the string is always 1. length Optional. It is the number of characters to extract. If this parameter is omitted

What are the advantages of using PL / SQL?

Advantages of PL/SQL: 1 PL/SQL is a procedural language. 2 PL/SQL is a block structure language. 3 PL/SQL handles the exceptions. 4 PL/SQL engine can process the multiple SQL statements simultaneously as a single block hence reduce network traffic and provides better performance.