The result of this query is: part INSTR(email, '.') - INSTR(email, simply calculates the length of the substring. SUBSTR(email, INSTR(email, INSTR(email, '.') - INSTR(email, AS substring You may also want to retrieve a substring that doesn't end at the end of the string but at some specific character, e.g., before '.' Here's how you can do this: You do this by subtracting the index from the column length then adding 1: SELECT Left(fldcall, 3) AS Group1, Mid(fldcall, 4, 1) AS Group2, tblcalls., tblzip.fldcity FROM tblcalls LEFT JOIN tblzip ON tblcalls.fldzipcode tblzip. You can calculate it using the INSTR() and the LENGTH() functions. I can't find the Left command in any documentation of SQLite so I guess it isn't there but how could I get it to work then. To find the index of the specific character, you can use the INSTR(column, character) function, where column is the literal string or the column from which you'd like to retrieve the substring, and character is the character at which you'd like to start the substring (here, third argument of the SUBSTR() function is the length of the substring. This time, you're looking for a specific character whose position can vary from row to row. The result is: use the SUBSTR() function just as in the previous examples. SUBSTR(email, INSTR(email, LENGTH(email) - INSTR(email, + 1) AS substring You'd like to display the substring that starts at the sign and ends at the end of the string, but you don't know the exact indexes or lengths. The length of the substring is 5 ( end_index - start_index + 1). This time, the second argument of the function is 2, since we want to start at index 2. It takes three parameters: String: It is a required parameter. SUBSTRING (): This function is used to find a sub-string from the string from the given position. The result is: use the SUBSTR() function just as in the previous example. Method 1: Using SUBSTRING () and LEN () function We will use this method if we want to remove a part of the string whose position is known to us. If the N argument is omitted, ltrim (M) removes spaces from the left side of M. You'd like to display the substring between indexes 2 and 6 (inclusive). The ltrim () function returns a string formed by removing any and all characters that appear in the second argument (N) from the left side of the first argument (M). >SUBSTR(email, 1, 7) will return the substrings of the values in the email column that start at the first character and go for seven characters. This means the first character has index 1, the second character has index 2, etc. Watch out! Unlike in some other programming languages, the indexes start at 1, not 0. The third argument is the length of the substring. The second argument is the index of the character at which the substring should begin. The first argument is the string or the column name. You'd like to display the first seven characters of each email. In the emails table, there is an email column. You have a column of strings, and you'd like to get substrings from them.
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