Variable declaration syntax Use the following syntax to declare a variable. <variable_declaration> ::= <variable_name> [<type>] [ { DEFAULT | := } <expression>] Where: variable_name The name of the variable. The name must follow the naming rules for Object identifiers. type A SQL data...
DECLAREcounterINTEGERDEFAULT0;maximum_countINTEGERdefault5;BEGINFORiIN1TOmaximum_countDOcounter:=counter+1;END FOR;RETURNcounter;END; 注:SnowSQL、Classic Console、execute_streamまたはexecute_stringメソッドをPython Connectorコードで使用している場合は、代わりにこの例を使用してください(SnowSQL、 Clas...
NULLIF is a valid function in SQL Server as well as in Snowflake. It accepts two parameters and returns NULL if the values of these two parameters are equal. Otherwise, it returns the value of the first parameter. NULIFF example in SQL Server: DECLARE @val1 int=10 DECLARE @val2 int=1...
CREATE OR REPLACE PROCEDURE DBMGT.DBADMIN.XXtest_SNF_DB_BACKUP("P_SOURCE_DB_NAME" VARCHAR(16777216)) RETURNS VARCHAR(16777216) LANGUAGE SQL EXECUTE AS CALLER AS ' DECLARE v_clone_db_name VARCHAR; v_sql VARCHAR; v_sql_loop VARCHAR; c1 CURSOR FOR SELECT ''ALTER ''|| REF_ENTITY_DOMAIN ...
Since SQL variables are limited to a maximum size of 256 characters, you must use a scripting block rather than a SQL variable. DECLARE -- In the code below, $$ is the multiline string delimiter. -- $$ lets us include newlines, single and double quotes -- without needing to escape ...
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您需要使用动态 SQL 并使用 EXECUTE IMMEDIATE 检查以下示例。 create or replace table temp as (with data as (select * from values ('Test'),('Best'),('Rest'), ('Lost and found')) select * from data); select * from temp; DECLARE res RESULTSET; col_name VARCHAR; select_statement VARCHA...
VARCHAR(max) and NVARCHAR(max) aka the LOB data types are variable-length data types that can store up to 2GB of data. Broadly speaking, there are two main standards for mapping code points to characters: non-Unicode and Unicode. Non-Unicode In SQL Server, most of the non-Unicode charact...
In SQL Server, in addition to theuniqueidentifier, we can also usebinary,Unicode,andnon-Unicodedatatypes (variable or fixed length) to store GUID values – more on that in the following section. Let’s store a big, positive numeric value into a UNIQUEIDENTIFIER and in a BINARY data type of...
PROCEDURE get_row_count(table_name VARCHAR) RETURNS INTEGER NOT NULL LANGUAGE SQL AS $$ DECLARE row_count INTEGER DEFAULT 0; res RESULTSET DEFAULT (SELECT COUNT(*) AS COUNT FROM IDENTIFIER(:table_name)); c1 CURSOR FOR res; BEGIN FOR row_variable IN c1 DO row_count := row_variable.coun...