diff --git a/Readme.md b/Readme.md
index d949f8b..a78b9f7 100644
--- a/Readme.md
+++ b/Readme.md
@@ -49,20 +49,70 @@ QueryBuilder
 include_once 'vendor/autoload.php';
 $qb = new QueryBuilder();
 
-$query = $qb->select();
-$query = $qb->insert();
-$query = $qb->update();
-$query = $qb->delete();
+$query = $qb->select(<*columns>);
+$query = $qb->insert(<table>);
+$query = $qb->update(<table>);
+$query = $qb->delete(<table>);
 ```
 
 ### Queries
 
-Select
-```
-$query = $qb->select();
-$query = $qb->select(['id', 'column1']);
+#### Select
+`SELECT <columns> FROM <table>[ JOIN <table2> ON <table>.<column_1> = <table2>.<column_2>][ WHERE <expr1>[ AND|OR <expr2>]][ GROUP BY <column1>[, <column2>]][ HAVING <expr1>[ AND|OR <expr2>]][ ORDER BY <column1> ASC|DESC[, <column2> ASC|DESC]]`
 
-$query = $query->from('table');
-$query = $query->joins([['table2', 'table1.column = table2.column']]);
-$query = $query->where([['table2.column2', 10]]);
+Mysql also include `[ LIMIT <limit>[ OFFSET <offset>]]`
 ```
+$query = $qb->select(); // use '*' for columns
+or
+$query = $qb->select()->select(['id', 'column1',]);
+or
+$query = $qb->select(['id', 'column1',]);
+
+$query->from('table1');
+$query->joins([['table2', 'table1.column1 = table2.column21'],]);
+$query->where(['table2.column22 = 10',]);
+$query->groupBy(['table1.column1',]);
+$query->having(['table1.column1 < 10',]);
+$query->orderBy(['table2.column22',]);
+$query->limit(10, 10);
+```
+
+#### Insert
+`INSERT INTO <table>[ (<columns>)]`
+with two options
+`<select query>` or
+` VALUES (<values>)`
+```
+$query = $qb->insert('table');
+
+$query->columns(['column1',]);
+$query->values(['value1',];
+or
+$query->select($select_query);
+```
+
+#### Update
+`UPDATE <table> SET <column1> = <value1>[, <column2> = <value2>][ WHERE <expr1>[ AND|OR <expr2>]]`
+```
+$query = $qb->update('table');
+$query->set([['column1', 10],]); or $query->set([['column' => 'column1', 'value' => 10],]);
+$query->where(['column2 = 10', ]);
+```
+
+#### Delete
+`DELETE FROM <table> WHERE <expr1>[ AND|OR <expr2>]`
+```
+$query = $qb->delete('table');
+$query->where(['column1 = 10',]);
+```
+
+
+Pass the query to a string
+```
+$str = $query->build();
+or
+$str = "{$query}";
+```
+
+## TODO
+Implement other databases