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Google Ads Query Language Grammar

Here is the Google Ads Query Language grammar reference (in regular expression notation):

Query            -> SelectClause FromClause WhereClause? OrderByClause? LimitClause? ParametersClause?
SelectClause     -> SELECT FieldName (, FieldName)*
FromClause       -> FROM ResourceName
WhereClause      -> WHERE Condition (AND Condition)*
OrderByClause    -> ORDER BY Ordering (, Ordering)*
LimitClause      -> LIMIT PositiveInteger
ParametersClause -> PARAMETERS Literal = Value (, Literal = Value)*

Condition        -> FieldName Operator Value
Operator         -> = | != | > | >= | < | <= | IN | NOT IN |
                    LIKE | NOT LIKE | CONTAINS ANY | CONTAINS ALL |
                    CONTAINS NONE | IS NULL | IS NOT NULL | DURING |
                    BETWEEN | REGEXP_MATCH | NOT REGEXP_MATCH
Value            -> Literal | LiteralList | Number | NumberList | String |
                    StringList | Function
Ordering         -> FieldName (ASC | DESC)?

FieldName        -> [a-z] ([a-zA-Z0-9._])*
ResourceName     -> [a-z] ([a-zA-Z_])*

StringList       -> ( String (, String)* )
LiteralList      -> ( Literal (, Literal)* )
NumberList       -> ( Number (, Number)* )

PositiveInteger  -> [1-9] ([0-9])*
Number           -> -? [0-9]+ (. [0-9] [0-9]*)?
String           -> (' Char* ') | (" Char* ")
Literal          -> [a-zA-Z0-9_]*

Function         -> LAST_14_DAYS | LAST_30_DAYS | LAST_7_DAYS |
                    LAST_BUSINESS_WEEK | LAST_MONTH | LAST_WEEK_MON_SUN |
                    LAST_WEEK_SUN_SAT | THIS_MONTH | THIS_WEEK_MON_TODAY |
                    THIS_WEEK_SUN_TODAY | TODAY | YESTERDAY
  • ?indicates an optional element.
  • * means zero or more; + means one or more.
  • (xxxxxx) indicates a grouping.
  • [a-z0-9] signifies character ranges.
  • | stands for "or".