This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
|
dev:sql:functions:concatenation [2009/12/04 22:53] tdo |
dev:sql:functions:concatenation [2010/07/09 03:33] els |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| {{page>:top_add&nofooter&noeditbtn}} | {{page>:top_add&nofooter&noeditbtn}} | ||
| - | <html><div align="center"><span style="color:red">DRAFT</span></div></html> | ||
| - | ====== Omnidex SQL Function: CASE ====== | ||
| {{page>:sql_bar&nofooter&noeditbtn}} | {{page>:sql_bar&nofooter&noeditbtn}} | ||
| + | |||
| + | ====== 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 C STRING. | ||
| - | All blanks are preserved during concatenation. Use the TRIM function to eliminate blanks if desired. | ||
| ===== Syntax ===== | ===== Syntax ===== | ||
| - | [ < column_spec | "string" > || < column_spec | "string " > [ || <column_spec | "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 | + | |
| - | where company = 'systems' | + | |
| - | </code> | + | |
| - | ==== Example 2 ==== | + | |
| - | <code SQL> | + | |
| - | select | + | |
| - | PRODUCTS.PRODUCT_NO || ' is the product number for ' || PRODUCTS.DESCRIPTION | + | |
| - | from products | + | |
| - | </code> | + | |
| + | FIRST_LINE | ||
| + | ----------------------------------------------------------------------------- | ||
| + | Individual: 000900011022 Name: MS. MARY LEWIS | ||
| + | Individual: 000900047761 Name: MRS. ALICE R TOLLIVER | ||
| + | Individual: 000900047762 Name: MR. SIDNEY K TOLLIVER | ||
| + | Individual: 000900067115 Name: MRS. JENNIFER J HOPKINS | ||
| + | Individual: 000900067114 Name: MR. CHARLIE HOPKINS | ||
| + | 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> | ||
| {{page>:bottom_add&nofooter&noeditbtn}} | {{page>:bottom_add&nofooter&noeditbtn}} | ||
| + | |||
| + | |||