Struct Select

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pub struct Select<'a> { /* private fields */ }
Expand description

SELECT

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impl<'a> Select<'a>

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pub fn new(table: &'a str) -> Self

Construct a new SELECT query builder

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pub fn alias(&mut self, table: &'a str, alias: &'a str) -> &mut Self

Set a table alias (AS)

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pub fn fields(&mut self, fields: &[&'a str]) -> &mut Self

Specify desired table fields in result set

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pub fn filter(&mut self, expr: &'a str) -> &mut Self

Filter result set based on conditions (WHERE clause)

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pub fn group_by(&mut self, val: &'a str) -> &mut Self

Group result set based on common value (GROUP BY clause)

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pub fn having(&mut self, expr: &'a str) -> &mut Self

Filter result set based on an expression on an aggregate value (HAVING clause)

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pub fn order_by(&mut self, expr: &'a str, direction: Order) -> &mut Self

Order result set based on the value of an expression (ORDER BY clause)

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pub fn join( &mut self, table: &'a str, on_left: &'a str, on_right: &'a str, kind: Join, ) -> &mut Self

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pub fn limit(&mut self, limit: usize) -> &mut Self

Limit number of rows in result set (LIMIT)

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pub fn offset(&mut self, offset: usize) -> &mut Self

Offset number of rows in result set (OFFSET)

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pub fn build(&self) -> String

Generate SQL query (String) from subsequent method calls

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impl<'a> Debug for Select<'a>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'a> Display for Select<'a>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'a> Freeze for Select<'a>

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impl<'a> RefUnwindSafe for Select<'a>

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impl<'a> Send for Select<'a>

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impl<'a> Sync for Select<'a>

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impl<'a> Unpin for Select<'a>

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impl<'a> UnwindSafe for Select<'a>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToString for T
where T: Display + ?Sized,

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fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.