Sql Like is used with Where clause. It is a smart way to search for a pattern.
A pattern can include regular characters and wildcard characters.
Wildcard characters makes the LIKE clause more flexible than using the = and != string comparison operators.
The specific conditions using valid wildcard characters. The pattern must be enclosed in quotes. The following are the Sql Server valid wildcard characters.
|%||Match any string, zero or more|
|_ (underscore)||Any single character|
|[ ]||Any single character within the specified range ([a-f]) or set ([abcdef]).|
|[^]||Any single character not within the specified range ([^a-f]) or set ([^abcdef]).|
Example: Let's use CONTACT table to illustrate. You want to know all your contacts that their first name start with 'T'.
|1||White||Alan||210 George St||Sydney||NSW||2000|
|2||Johnson||Benjamin||11 Cooper St||Surry Hill||NSW||2010|
|3||Brown||Peter||72 Haymarket St||Haymarket||NSW||2000|
|4||Anderson||Thomas||33 Collins St||Melbourne||VIC||3000|
|5||Gomdas||Tony||78 Marine Pde||Coolangatta||QLD||4225|
|6||Green||Tony||123 Second Ave||Liverpool||NULL||4225|
|7||Gutman||Philip||27 Swanson St||Melbourne||VIC||3000|
|Anderson||Thomas||33 Collins St|
|Gomdas||Tony||78 Marine Pde|
|Green||Tony||123 Second Ave|
TIPS: When you use sql like, all characters in the pattern string are significant, this includes leading or trailing spaces.
The core of Sql, selecting data from table.
Conditionally selecting rows from table.
Eliminating duplicate values in the output.
Counting number of rows.
Getting the sum of a field
This function will return the highest value.
This function will return the lowest value.
This function will return the average value.
Sql Order By
Sorting the output
Sql And Or
Connecting two or more conditions in the Where or Having clause.
Sql Group By
Grouping rows into sets.
To filter the result of aggregation
Added to conditions to show results between two values.
Return from Sql Like to Sql Commands
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