Where $ORACLE_HOME is the directory under which the gateway is installed. The COLLATION function used in SQL is evaluated during the compilation of the SQL statement. Build a linguistic index for each language that the application supports.
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For each index, the rows in the language other than the one on which the index is built are collated together at the end of the sequence. The following example builds linguistic indexes for French and German. Oracle recommends that if you want to use UCA collations, then use only the UCA0700 collations, except UCA0700_DUCET and UCA0700_ROOT. For more information about the collation architecture in Oracle Database. Note that À voir is at the beginning of the list in a German collation. For example, in traditional German, the uppercase letters for ß are SS.
Tertiary ignorable characters are generally ignored in linguistic comparison. They are mainly comprised of control codes, format characters, variation selectors, and so on. XYO calls its network a people-powered location network built on Ethereum. It uses location-based guide on ethereum wallets signals that smart contracts can gather data from in the real world. The consensus algorithm is combined with Transient Key Chaining to ensure that ledgers flowing into the network are valid while making it impossible to falsify the chain of origin for the data.
Only new tables created in the schema after the change inherit the new default collation. Therefore, when a pseudo-collation is declared for a key column of such an object, the values of the column are collated and grouped as described below. All database objects created in the schema that do not contain the DEFAULT COLLATION clause have their default collation set to BINARY, unless the session parameter DEFAULT_COLLATION overrides it. The XML Query standard XQuery defines features to specify collation for collation-sensitive operators in XML Query expressions.
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Therefore, nested tables, which are always based on a user-defined collection type, also support USING_NLS_COMP collation only. Release 2 (12.2), creation of an index clusters with key columns declared with a collation other than BINARY, USING_NLS_COMP, USING_NLS_SORT, or USING_NLS_SORT_CS is not supported. The same restriction applies to columns of hash clusters that have the SORT clause. Key columns of hash clusters without the SORT clause can have any collation. The collation of a primary key column of an IOT can be changed with the ALTER TABLE MODIFY statement to any of the above mentioned collations only. Collation determination is the process of selecting the right collation to apply during the execution of a collation-sensitive operation.
You can see the full list of non-spacing characters and punctuation characters in a multilingual collation definition when viewing the definition in the Oracle Locale Builder. Generally, neither punctuation characters nor non-spacing characters are included in monolingual collation definitions. In some monolingual collation definitions, the space character and the tabulator character may be included. The comparison algorithm automatically assigns a minor value to each undefined character.
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3 Using Linguistic Collation
Blackbird, Black-bird, and Black bird are sorted after blackbird due to case difference on the first letter B (U+0042), but before BlackBird due to case difference at the second b (U+0062). The parameter backwards controls if diacritics are to be sorted backward. Bereft of the cosmic spirits of the Eternal Ones, these incomplete host bodies can only carry out their base directives without mercy or compassion.
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- Black-bird is sorted before Blackbird is because HYPHEN (U+002D) has a small quaternary weight than the letter b (U+0062) in Blackbird.
- Append _AI to an Oracle Database collation name for an accent-insensitive and case-insensitive collation.
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- Named collations are the same collations that are specified as values for the NLS_SORT parameter.
- When MAX_STRING_SIZE is set to STANDARD, the maximum length of a collation key is restricted to 2000 bytes.
The following example shows how to set up a French linguistic index. You may want to set NLS_SORT as a client environment variable instead of using the ALTER SESSION statement. This WHERE clause is not necessary if the column has already been defined as a NOT NULL column in the schema. Queries choose an index based on the argument of the NLSSORT function specified in the ORDER BY clause. The following table shows how different SQL or PL/SQL operations behave with these different settings. Perform a monolingual German collation by using the NLSSORT function with the NLS_SORT parameter set to german.
You may want to use a binary collation if the binary collation order of the character set is appropriate for the character set you are using. Black bird and Black-bird are sorted before blackbird because both SPACE (U+0020) and HYPHEN (U+002D) are not treated as ignorable characters but they are smaller than b (U+0062) at the primary level. Black bird is sorted before Black-bird because SPACE (U+0020) is small than HYPHEN (U+002D) at the primary level. Variable characters are treated as ignorable characters on the primary, secondary and tertiary levels. The quaternary weight of a character depends on if the character is a variable, ignorable, or other.
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That is, activating the linguistic behavior of these SQL operations is equivalent to including their arguments into calls to the NLSSORT function. In Thai and Lao, some characters must first change places with the following character before sorting. Normally, these types of characters are symbols representing vowel sounds, and the next character is a consonant. Set the SWAP_WITH_NEXT linguistic flag for all characters that must change places before sorting. You can use Oracle Locale Builder to view the setting of the canonical equivalence flag in existing multilingual collations.
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- For example, Oracle Database supports a monolingual French sort , but you can specify a multilingual French collation .
The primary and secondary level orders for the dash character – is 0. If a dash is compared with another character whose primary level weight is nonzero, for example, u, then no result for the primary level is available because u is not compared with anything. In this case, Oracle Database finds a difference between – and u only at the tertiary level.
The first step compares the major value of the entire string from a table of major values. Usually, letters with the same appearance have the same major value. The second step compares the minor value from a table of minor values. Oracle Database defines letters with diacritic and case differences as having the same major value but different minor values. When configuring the gateway for two-phase commit, a table must be created in the Teradata database for logging transactions.
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The name must be enclosed in double-quotes, if it contains the space character. The COLLATE operator overrides the collation that the database derives using the standard collation derivation rules for expr. The COLLATE operator can be applied only to the expressions of the data types VARCHAR2, CHAR, LONG, NVARCHAR2, and NCHAR.