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Update db-query-builder.md #8536

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Update db-query-builder.md 
Minor grammatical corrections
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@sprynt
sprynt committed May 24, 2015
commit 1332cdad99e1959d75390478cf581c96df96aecb
12 changes: 6 additions & 6 deletions docs/guide/db-query-builder.md
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Expand Up @@ -2,7 +2,7 @@ Query Builder
=============

Built on top of [Database Access Objects](db-dao.md), query builder allows you to construct a SQL statement
in a programmatic and DBMS-agnostic way. Compared to writing raw SQLs, using query builder will help you write
in a programmatic and DBMS-agnostic way. Compared to writing raw SQL statements, using query builder will help you write
more readable SQL-related code and generate more secure SQL statements.

Using query builder usually involves two steps:
Expand Down Expand Up @@ -61,7 +61,7 @@ $query->select(['id', 'email']);
$query->select('id, email');
```

The column names being selected may include table prefixes and/or column aliases, like you do when writing raw SQLs.
The column names being selected may include table prefixes and/or column aliases, like you do when writing raw SQL statements.
For example,

```php
Expand Down Expand Up @@ -124,7 +124,7 @@ $query->from('user');
```

You can specify the table(s) being selected from in either a string or an array. The table names may contain
schema prefixes and/or table aliases, like you do when writing raw SQLs. For example,
schema prefixes and/or table aliases, like you do when writing raw SQL statements. For example,

```php
$query->from(['public.user u', 'public.post p']);
Expand Down Expand Up @@ -353,7 +353,7 @@ In the above code, the array keys are column names while the array values are th
The PHP constant `SORT_ASC` specifies ascending sort and `SORT_DESC` descending sort.

If `ORDER BY` only involves simple column names, you can specify it using a string, just like you do when writing
raw SQLs. For example,
raw SQL statements. For example,

```php
$query->orderBy('id ASC, name DESC');
Expand All @@ -380,7 +380,7 @@ $query->groupBy(['id', 'status']);
```

If `GROUP BY` only involves simple column names, you can specify it using a string, just like you do when writing
raw SQLs. For example,
raw SQL statements. For example,

```php
$query->groupBy('id, status');
Expand Down Expand Up @@ -607,7 +607,7 @@ value which will be used as the index value for the current row.

When working with large amounts of data, methods such as [[yii\db\Query::all()]] are not suitable
because they require loading all data into the memory. To keep the memory requirement low, Yii
provides the so-called batch query support. A batch query makes uses of the data cursor and fetches
provides the so-called batch query support. A batch query makes use of the data cursor and fetches
data in batches.

Batch query can be used like the following:
Expand Down