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- | <html><div align="center"><span style="color:red">DRAFT</span></div></html> | ||
- | ====== Omnidex SQL Function: CASE ====== | ||
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+ | ====== Omnidex SQL Function: || (Concatenation) ====== | ||
===== Description ===== | ===== Description ===== | ||
- | The || (two vertical bars) function returns a single concatenated character string made up of two or more character strings. CHAR||CHAR will return a CHAR string; everything else will return a C STRING. | + | The concatenation operator - || (two vertical bars) - returns a single concatenated character string made up of two or more character expressions. All blanks are preserved during concatenation. Use the TRIM function to eliminate blanks if desired. |
+ | |||
+ | A concatenation operator on two character strings (CHARACTER_DATATYPE_COLUMN1 || CHARACTER_DATATYPE_COLUMN2) will return a CHARACTER string; everything else will return a STRING. | ||
- | All blanks are preserved during concatenation. Use the TRIM function to eliminate blanks if desired. | ||
===== Syntax ===== | ===== Syntax ===== | ||
- | string || string[ || string[...]] | + | |
+ | character_expression || character_expression [ || character_expression ...] | ||
===== Examples ===== | ===== Examples ===== | ||
- | ==== Example 1 ==== | + | ==== Example 1: Concatenating both columns and text ==== |
- | <code SQL> | + | <code> |
- | select company, | + | > select 'Individual: ' || individual || ' Name: ' || name first_line from individuals; |
- | CUSTOMERS.LASTNAME || ', ' || CUSTOMERS.FIRSTNAME | + | |
- | from customers | + | FIRST_LINE |
- | where company = 'systems' | + | ----------------------------------------------------------------------------- |
- | </code> | + | Individual: 000900011022 Name: MS. MARY LEWIS |
- | ==== Example 2 ==== | + | Individual: 000900047761 Name: MRS. ALICE R TOLLIVER |
- | <code SQL> | + | Individual: 000900047762 Name: MR. SIDNEY K TOLLIVER |
- | select | + | Individual: 000900067115 Name: MRS. JENNIFER J HOPKINS |
- | PRODUCTS.PRODUCT_NO || ' is the product number for ' || PRODUCTS.DESCRIPTION | + | Individual: 000900067114 Name: MR. CHARLIE HOPKINS |
- | from products | + | Individual: 000900215567 Name: MS. KIMBERLY BLUE |
+ | Individual: 000900240828 Name: KATHLEEN TUCKER</code> | ||
+ | |||
+ | ==== Example 2: Complex expression ==== | ||
+ | The following complex example creates a string containing the name and an optional email. | ||
+ | |||
+ | <code> | ||
+ | > Select (((trim($proper(NAME)) || | ||
+ | >> case | ||
+ | >> when EMAIL > ' ' then ' (' | ||
+ | >> else '' | ||
+ | >> end) || | ||
+ | >> trim(EMAIL)) || | ||
+ | >> case | ||
+ | >> when EMAIL > ' ' then ')' | ||
+ | >> else '' | ||
+ | >> end) name_and_email | ||
+ | >> from INDIVIDUALS; | ||
+ | |||
+ | NAME_AND_EMAIL | ||
+ | ----------------------------------------------------------------------------- | ||
+ | Ms. Mary Lewis | ||
+ | Mrs. Alice R Tolliver (alicetolliver@securitasinc.com) | ||
+ | Mr. Sidney K Tolliver (sidneytolliver@deere.com) | ||
+ | Mrs. Jennifer J Hopkins | ||
+ | Mr. Charlie Hopkins | ||
+ | Ms. Kimberly Blue | ||
+ | Kathleen Tucker | ||
</code> | </code> | ||
+ | ====== Additional Resources ====== | ||
+ | |||
+ | See also: | ||
+ | {{page>dev:sql:functions:see_also_string&nofooter&noeditbtn&noheader}} | ||
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